Parts for the goods of subclasses 47321, 47323 and 47330

1. Scope and Applicability

This PCR addresses manufacture of dedicated parts for sound recording/reproduction equipment, video recording/reproduction equipment, and microphones and their stands, loudspeakers, headphones or audio amplifiers. The distinguishing boundary is an identifiable part supplied for incorporation into that equipment, with its own part number, drawing revision and acceptance specification. It is not a PCR for complete equipment or for general-purpose electronic components merely because their customer makes audio equipment. The official classification establishes the parent equipment families [un-cpc-3-0-structure-2025; un-cpc-3-0-notes-2025].

The representative route is manufacture of a bobbinless, epoxy-bound copper loudspeaker voice coil: winding purchased insulated wire, applying a formulated adhesive, curing, removing reusable tooling, testing and packing. The technical publication demonstrates this type of route; it does not establish industry prevalence, an environmental benchmark, an obligatory design [us20170223463a1-voice-coil].

Recorder mechanisms, amplifier-specific populated boards, retained-former coils and moulded acoustic parts require their own drawing-based bill of materials, process conditions and atomic exchanges before a foreground dataset is usable. Apply the common collection, boundary and allocation rules here, then instantiate only the operations actually performed. Do not transfer the representative coil's bill of materials or quantities to another part type. This is a category methodology with one worked process structure, not a claim that every part uses coil winding.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.radio-television-and-communication-equipment-and-apparatus.parts-for-the-goods-of-subclasses-47321-47323-and-47330
classification_refs	CPC 3.0: 47402; classification identity only; acceptance is maintained separately
covered_products	Dedicated manufactured parts for sound/video recording or reproducing apparatus and electroacoustic equipment, identifiable by intended parent equipment and part drawing
excluded_products	Complete recorders, loudspeakers, microphones, microphone stands and amplifiers; general-purpose bare printed circuits, integrated circuits, resistors, capacitors, wire and magnets sold as those products; radio/television reception and telecommunications parts outside this parent-equipment scope; recorded media; repair services
representative_product	Bobbinless epoxy-bound copper loudspeaker voice coil, cured, tested, with integral winding ends and without diaphragm or magnet assembly
production_route	Insulated-wire winding and epoxy adhesive application; electrical curing and demoulding; electrical/dimensional inspection and packing
market_state	New accepted part at the part manufacturer's dispatch gate; primary and shipping packaging reported separately from net part mass

3. Reference Flow

Field	Value
What	Accepted bobbinless epoxy-bound copper loudspeaker voice coil for incorporation into a specified loudspeaker
How much	1 kg net accepted coils of one part number and revision; report corresponding piece count
How well	Conforms to the declared drawing, winding resistance at its specified test temperature, insulation and dimensional acceptance criteria; criteria and measured results are foreground records
How long or cycle	One manufacturing and acceptance cycle; no final loudspeaker operating life is assigned to this intermediate product
reference_flow_link	accepted_voice_coil

Field	Value
Reference amount	1
Reference product flow	Bobbinless epoxy-bound copper loudspeaker voice coil
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	part number; drawing revision; intended parent equipment; conductor composition and insulation; wire diameter and turns; coil geometry; adhesive formulation and supplied state; curing route; bobbinless construction; net part mass and piece count; resistance test temperature and acceptance criteria; insulation test method; reject/rework treatment; packaging configuration; production site and country; record period; purchased-versus-made stages; upstream dataset boundary

Declare every required qualifier in the data package. The reference quantity is a normalization convention, not a measured yield or an empirical range. A different part requires a different concrete reference exchange and its own performance qualifiers; a generic “equipment parts” exchange cannot replace it.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
net_reference_mass	accepted output	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Weigh accepted dry cured parts without packaging, temporary sleeves or rejected units. Record calibrated balance resolution and tare.
piece_mass_conversion	piece-based production and packing	Mass	kg	Convert counts using measured mean mass for the same part revision and lot. Do not use a universal coil or box mass. Retain sample count and variation.
energy_conversion	electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	MJ	Preserve meter kWh and normalize with 1 kWh = 3.6 MJ. Do not treat electrical energy as fuel mass or add grid emissions as direct site emissions.
wire_and_adhesive_basis	winding inputs	Mass	kg	Wire quantity includes its supplied insulation. Adhesive quantity is total supplied formulation; record solids and any volatile constituents separately. Do not duplicate resin or insulation already included in purchased inputs.
batch_matching	all inventory rows	Mass or energy as specified on the row	kg or MJ	Use a common closed production period, account for work in progress and rework, and divide allocated exchange totals by accepted net mass M. Require M greater than zero.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased insulated winding wire and formulated epoxy adhesive received at the part factory; reusable winding sleeves are tooling, not retained product in the representative route
starting_condition_role	Foreground entry condition for intermediate-part manufacture
product_classification_scope	Dedicated audio/video and electroacoustic equipment parts; related general components retain their own identity
recursive_input_rule	Record a purchased voice coil or other same-category intermediate at its actual incoming state with supplier identity and upstream dataset. Include only subsequent in-house operations; never expand the same input recursively or count its embodied production twice.
upstream_dataset_requirement	Link purchased materials, electricity, packaging, transport and exported-waste treatment to boundary-compatible upstream/downstream support datasets; disclose geography, technology, time and allocation. A gate-to-gate foreground package alone is not a cradle-to-gate result.
disclosure	Declare made/bought stages, internal transfer links, subcontract operations, transport legs, waste destinations, tooling lifetime, utilities, exclusions and intended downstream application.

rule_id	applies_to	rule	source_ids
boundary_part_gate	system model	Provide a clearly identified intermediate-part production inventory. A cradle-to-gate result includes upstream supply and production-waste treatment and excludes final-equipment use and end of life; justify this partial boundary.	wri-wbcsd-product-standard-2011
boundary_processes	representative foreground	Include wire winding, adhesive application, actual curing energy, demoulding, inspection, failed tests, rework and packing. Diaphragm attachment and magnet assembly belong to downstream loudspeaker production in this reference state.	us20170223463a1-voice-coil
boundary_conditional_exchanges	route instantiation	Verify all routes against the actual bill of materials, safety data sheets and site records. Add each used solvent, its species-specific release, cleaning agent, fuel, water stream, tooling replacement and subcontract service as a separate exchange; do not assume zero because it is absent from the representative cards. The representative recipe is supplied solvent-free and electrically cured; substantiate that condition.
boundary_tooling	reusable sleeves and equipment	Record tooling material, replacement count, reuse life and output served. Include attributable replacement burdens or document and justify exclusion. Do not count a removable sleeve as retained coil mass.	us20170223463a1-voice-coil
boundary_support	logistics and waste treatment	Collect received mass, distance, transport mode, load allocation and waste transfer destination. Attach transport and treatment datasets at their actual boundaries, without duplicating services already included in supplier datasets.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
winding	Winding and adhesive application	conditional	Representative bobbinless coil is wound in the foreground	foreground production	wound uncured coil mass
curing	Electrical curing and demoulding	conditional	Representative wound coils are cured in the foreground	foreground conditioning	cured untested coil mass
release	Inspection and packing	required	All manufactured parts undergo declared acceptance; detailed cards below instantiate the voice-coil route	foreground release	1 kg accepted net coils

Internal transfer pairs are conservation links and must cancel when processes are aggregated. Waste cards are conditional on the specific stream arising. Packed output mass always means net coil mass; packaging burdens remain on their own input rows. Additional part routes require validated process-map and atomic-inventory instantiation before dataset use.

Process: Winding and adhesive application (winding)

Inputs

Product flows

Insulated copper winding wire (winding_wire)

Inclusion condition (inclusion_condition): When winding the representative coil. This condition determines only whether this concrete exchange is present.

• Selected flow: Insulated copper winding wire
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Actual supplied wire consumed, including coating and winding ends; Q_wire/M
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material
• Sources: us20170223463a1-voice-coil

Formulated heat-curing epoxy adhesive (epoxy_adhesive)

Inclusion condition (inclusion_condition): When separately supplied adhesive is applied; do not duplicate pre-coated bonding layers. This condition determines only whether this concrete exchange is present.

• Selected flow: Formulated heat-curing epoxy adhesive
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed complete supplied adhesive formulation consumed; Q_adhesive/M; solvent-free condition must be demonstrated
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material
• Sources: us20170223463a1-voice-coil

Electricity (winding_electricity)

Inclusion condition (inclusion_condition): When winding and adhesive application use electricity. This condition determines only whether this concrete exchange is present.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ; unit group 93a60a57-a3c8-11da-a746-0800200c9a66
• Amount rule: Allocated winding and adhesive application meter total in MJ divided by M
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_winding
• Sources:

Outputs

Product flows

Wound uncured epoxy-coated copper voice coil (uncured_coil_out)

Inclusion condition (inclusion_condition): When transferring wound coils to curing. This condition determines only whether this concrete exchange is present.

• Selected flow: Wound uncured epoxy-coated copper voice coil
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed outgoing uncured coils divided by M; paired with uncured_coil_in
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_transfer_winding
• Sources: us20170223463a1-voice-coil

Waste flows

Insulated copper winding wire offcuts (winding_wire_scrap)

Inclusion condition (inclusion_condition): When wire cutting generates exported offcuts. This condition determines only whether this concrete exchange is present.

• Selected flow: Insulated copper winding wire offcuts
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed exported wire offcuts including insulation divided by M; identify recovery destination
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste_winding
• Sources:

Uncured epoxy adhesive waste (uncured_adhesive_waste)

Inclusion condition (inclusion_condition): When adhesive is discarded before cure. This condition determines only whether this concrete exchange is present.

• Selected flow: Uncured epoxy adhesive waste
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed unused adhesive discarded divided by M; retain uncured state and hazard assessment
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste_winding
• Sources:

Process: Electrical curing and demoulding (curing)

Inputs

Product flows

Wound uncured epoxy-coated copper voice coil (uncured_coil_in)

Inclusion condition (inclusion_condition): When receiving the wound uncured coil. This condition determines only whether this concrete exchange is present.

• Selected flow: Wound uncured epoxy-coated copper voice coil
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Incoming transfer mass divided by M; same batch and state as uncured_coil_out
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_transfer_curing
• Sources: us20170223463a1-voice-coil

Electricity (curing_electricity)

Inclusion condition (inclusion_condition): When electrical curing is used. This condition determines only whether this concrete exchange is present.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ; unit group 93a60a57-a3c8-11da-a746-0800200c9a66
• Amount rule: Metered electrical curing, ventilation and attributable vacuum energy converted to MJ and divided by M
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_curing
• Sources:

Outputs

Product flows

Cured untested bobbinless copper voice coil (cured_coil_out)

Inclusion condition (inclusion_condition): When transferring demoulded coils for inspection. This condition determines only whether this concrete exchange is present.

• Selected flow: Cured untested bobbinless copper voice coil
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Net demoulded outgoing coil mass divided by M; excludes reusable sleeves; paired with cured_coil_in
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_transfer_curing
• Sources: us20170223463a1-voice-coil

Waste flows

Cured epoxy resin flash waste (cured_epoxy_flash)

Inclusion condition (inclusion_condition): When demoulding or trimming generates cured resin flash. This condition determines only whether this concrete exchange is present.

• Selected flow: Cured epoxy resin flash waste
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Segregated cured flash discarded divided by M; exclude adhesive retained in product
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste_curing
• Sources:

Process: Inspection and packing (release)

Inputs

Product flows

Cured untested bobbinless copper voice coil (cured_coil_in)

Inclusion condition (inclusion_condition): When the representative cured coil is received. This condition determines only whether this concrete exchange is present.

• Selected flow: Cured untested bobbinless copper voice coil
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Incoming net coil mass divided by M; paired with cured_coil_out
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_transfer_release
• Sources: us20170223463a1-voice-coil

Electricity (release_electricity)

Inclusion condition (inclusion_condition): When inspection or packing uses electricity. This condition determines only whether this concrete exchange is present.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ; unit group 93a60a57-a3c8-11da-a746-0800200c9a66
• Amount rule: Metered inspection and packing electricity converted to MJ and divided by M
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_release
• Sources:

Corrugated cardboard box (corrugated_box)

Inclusion condition (inclusion_condition): When corrugated shipping boxes are used. This condition determines only whether this concrete exchange is present.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Actual corrugated boxes consumed including discarded boxes divided by M; measured unit masses
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_pack
• Sources:

Low-density polyethylene packaging bag (polyethylene_bag)

Inclusion condition (inclusion_condition): When LDPE bags are used. This condition determines only whether this concrete exchange is present.

• Selected flow: Low-density polyethylene packaging bag
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Actual LDPE bag consumption including discarded bags divided by M; verify polymer and density grade
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_pack
• Sources:

Outputs

Product flows

Bobbinless epoxy-bound copper loudspeaker voice coil (accepted_voice_coil)

Inclusion condition (inclusion_condition): Representative finished part at declared dispatch gate. This condition determines only whether this concrete exchange is present.

• Selected flow: Bobbinless epoxy-bound copper loudspeaker voice coil
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Accepted net coil mass M/M = 1 kg; retain measured M and matching accepted count; exclude packaging
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_release
• Sources: us20170223463a1-voice-coil

Waste flows

Rejected cured epoxy-bound copper voice coil (rejected_voice_coil)

Inclusion condition (inclusion_condition): When a cured coil is finally rejected and exported as waste. This condition determines only whether this concrete exchange is present.

• Selected flow: Rejected cured epoxy-bound copper voice coil
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed rejected coil mass leaving for waste treatment divided by M; internal rework tracked separately
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste_release
• Sources:

Waste corrugated cardboard box (corrugated_box_waste)

Inclusion condition (inclusion_condition): When boxes are damaged or discarded at the factory. This condition determines only whether this concrete exchange is present.

• Selected flow: Waste corrugated cardboard box
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed discarded corrugated boxes divided by M; exclude packaging dispatched with accepted coils
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste_release
• Sources:

Waste low-density polyethylene packaging bag (polyethylene_bag_waste)

Inclusion condition (inclusion_condition): When LDPE bags are damaged or discarded at the factory. This condition determines only whether this concrete exchange is present.

• Selected flow: Waste low-density polyethylene packaging bag
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg; unit group 93a60a57-a4c8-11da-a746-0800200c9a66
• Amount rule: Weighed discarded LDPE bags divided by M; keep polymer and contamination state
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted coil output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_waste_release
• Sources:

7. Allocation and Co-product Handling

rule_id	applies_to	rule	source_ids
allocation_subdivision	shared operations	Prefer separately measured operations. Where separation is infeasible, use a demonstrated physical driver; disclose a justified alternative when no physical relationship can be established.	wri-wbcsd-product-standard-2011
allocation_factory	winding, curing and testing	Allocate shared electricity from measured equipment time and load, or occupied cure capacity validated against the meter. Do not allocate different part designs solely by revenue or net mass without explaining the causal relationship. Fractions must sum to one over products served.
allocation_rework	rejected and reworked coils	Burdens of failed units and all repeated operations remain in the producing cohort and are normalized to accepted output. Internal rework is not a negative input or a saleable co-product.
allocation_scrap	wire scrap and exported waste	Disclose whether each output is waste or a saleable co-product and justify any allocation. Record recycling treatment and allocation consistently, with no automatic avoided-primary-copper credit deducted from manufacturing.	wri-wbcsd-product-standard-2011

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_material	winding	wire and adhesive	weighing and stock ledger	lot; part_revision; supplied_composition; gross_issue; return; opening_stock; closing_stock; tare	Calibrated weighing reconciled to stores and supplier specification	kg	Each batch and inventory close	All batches in declared representative production period	Named factory winding line	Sum actual consumption after stock and return adjustment, then apply calc_normalize	Calibration; invoices; SDS; batch records; stock reconciliation
cp_transfer_winding	winding	internal coils	transfer register	source_batch; destination_batch; part_revision; input_mass; output_mass; opening_WIP; closing_WIP; rework_mass	Weigh paired transfers and reconcile production records	kg	Every transfer	Same period as accepted output with WIP reconciliation	Linked stations at the declared site	Pair identical transfers once on each side; cancel on aggregation	Traceable transfer tickets; batch closure
cp_transfer_curing	curing	internal coils	transfer register	source_batch; destination_batch; part_revision; input_mass; output_mass; opening_WIP; closing_WIP; rework_mass	Weigh paired transfers and reconcile production records	kg	Every transfer	Same period as accepted output with WIP reconciliation	Linked stations at the declared site	Pair identical transfers once on each side; cancel on aggregation	Traceable transfer tickets; batch closure
cp_transfer_release	release	internal coils	transfer register	source_batch; destination_batch; part_revision; input_mass; output_mass; opening_WIP; closing_WIP; rework_mass	Weigh paired transfers and reconcile production records	kg	Every transfer	Same period as accepted output with WIP reconciliation	Linked stations at the declared site	Pair identical transfers once on each side; cancel on aggregation	Traceable transfer tickets; batch closure
cp_energy_winding	winding	electrical energy	meter log	meter_id; start_kWh; end_kWh; equipment; time; load; part_batch; shared_fraction	Submeter actual runs including standby attributable to production, vacuum and heating where used	kWh; MJ after conversion	Each run or metered production period	Include ordinary production, start-up, failed runs and rework	Declared equipment and shared supply	Meter differences times justified allocation fractions, convert and normalize	Meter calibration; schedule; reconciliation to site bill
cp_energy_curing	curing	electrical energy	meter log	meter_id; start_kWh; end_kWh; equipment; time; load; part_batch; shared_fraction	Submeter actual runs including standby attributable to production, vacuum and heating where used	kWh; MJ after conversion	Each run or metered production period	Include ordinary production, start-up, failed runs and rework	Declared equipment and shared supply	Meter differences times justified allocation fractions, convert and normalize	Meter calibration; schedule; reconciliation to site bill
cp_energy_release	release	electrical energy	meter log	meter_id; start_kWh; end_kWh; equipment; time; load; part_batch; shared_fraction	Submeter actual runs including standby attributable to production, vacuum and heating where used	kWh; MJ after conversion	Each run or metered production period	Include ordinary production, start-up, failed runs and rework	Declared equipment and shared supply	Meter differences times justified allocation fractions, convert and normalize	Meter calibration; schedule; reconciliation to site bill
cp_waste_winding	winding	each named waste	waste weighing and transfer	waste_identity; cure_state; contamination; gross_mass; tare; batch; destination; treatment; recovered_quantity	Segregated weighing and licensed-recipient or equivalent destination record	kg	Each batch or waste removal	Same production cohort, adjusted for stored waste	Named generation station and waste store	Sum each actual stream independently; exclude internal reuse from exported waste	Weigh tickets; manifests; hazard assessment; treatment records
cp_waste_curing	curing	each named waste	waste weighing and transfer	waste_identity; cure_state; contamination; gross_mass; tare; batch; destination; treatment; recovered_quantity	Segregated weighing and licensed-recipient or equivalent destination record	kg	Each batch or waste removal	Same production cohort, adjusted for stored waste	Named generation station and waste store	Sum each actual stream independently; exclude internal reuse from exported waste	Weigh tickets; manifests; hazard assessment; treatment records
cp_waste_release	release	each named waste	waste weighing and transfer	waste_identity; cure_state; contamination; gross_mass; tare; batch; destination; treatment; recovered_quantity	Segregated weighing and licensed-recipient or equivalent destination record	kg	Each batch or waste removal	Same production cohort, adjusted for stored waste	Named generation station and waste store	Sum each actual stream independently; exclude internal reuse from exported waste	Weigh tickets; manifests; hazard assessment; treatment records
cp_release	release	accepted voice coil	quality and output register	part_revision; tested_count; accepted_count; reject_count; net_mass; resistance; test_temperature; insulation_result; dimensions; criteria; rework	Calibrated balance and product-specific electrical/dimensional acceptance tests	kg; piece; ohm; degC; drawing units	Every production batch; acceptance sampling plan declared	All accepted lots for the same period	Declared release station	Accepted net mass M is denominator; reconcile tested, accepted, rejected and reworked counts	Signed release record; test method; instrument calibration; sampling plan
cp_pack	release	corrugated boxes and polyethylene bags	pack consumption register	material; grade; thickness; box_or_bag_count; measured_unit_mass; returns; rejects; reuse_cycles	Weigh each packaging component separately and reconcile purchase and packing records	kg; piece	Each packing batch and stock close	Same period as accepted output	Declared packing station	Gross actual consumption less returns; retained and discarded packaging reconcile independently	Packaging specification; sampling weights; invoices; stock closure

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_normalize	external exchanges	q_i = Q_i / M, where Q_i is the measured cohort exchange after stock correction and any justified shared-process allocation; M is accepted net product mass	collected Q_i; M; allocation fraction	kg/kg or MJ/kg accepted part
calc_energy	metered electricity	Q_MJ = (end_kWh - start_kWh) × 3.6 × allocated_fraction; normalize by M	meters; allocation records; M	MJ per kg accepted part
calc_transfer	internal links	Outgoing transfer equals matching incoming transfer after explicitly recorded WIP changes; cancel both in plant aggregation	transfer tickets; WIP masses	reconciled internal mass
calc_yield_balance	coil manufacture	Input material mass plus opening WIP equals accepted coils plus exported process wastes plus identified releases plus closing WIP. Internal transfers and internal rework are not additional plant inputs. Investigate differences using documented measurement uncertainty.	wire; adhesive; coil output; wastes; WIP; identified releases	batch mass balance and measured yield
calc_pack_balance	each packaging material	Consumption equals retained shipped packaging plus recorded discarded packaging, adjusted for stock and reuse	counts; measured masses; waste weights	packaging reconciliation

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	all parts	Preserve one part number and revision per reference dataset; distinguish a coil from a complete transducer and a bare circuit from an assembled equipment-specific board.	Drawing; BOM; parent-equipment declaration; official classification
dq_completeness	actual route	Walk the actual process and compare material balances, SDS, maintenance and utility records. Add any missing concrete exchange; document applicability of every conditional card.	Signed route checklist; logs; mass balance
dq_representativeness	measurement period	Declare start/end dates, production volume, geography and technology; cover the operating modes that materially affect this part. Explain downtime, seasonal effects and omitted batches.	Production records; period selection justification
dq_uncertainty	all quantities	Retain uncertainty, missing records, allocation sensitivity and supplier data quality. Do not replace missing observations with patent examples or an unverified “typical” range.	Calibration records; uncertainty assessment; data-gap register
dq_sources	supporting datasets	Verify delivered state and upstream boundary; retain data-source version in the foreground package, while PCR flow UUIDs remain version-free.	Supplier declarations; dataset documentation

9. Validation Rules

rule_id	applies_to	rule	source_ids
validate_reference	reference product	Require all declared qualifiers, M greater than zero, accepted product status, net mass and count reconciliation. An uninstantiated generic part description is incomplete.
validate_atomic	every exchange	Require one physical or chemical exchange, correct product/waste/elementary type, compatible property and unit, and either verified flow identity or an explicit unresolved identity. A missing UUID never means a zero quantity.
validate_conservation	production and packing	Check calc_transfer, calc_yield_balance and calc_pack_balance. Set acceptance tolerance from measurement uncertainty and report deviations; this PCR supplies no invented universal tolerance.
validate_energy	three processes	Reconcile separate meters and allocation fractions; exclude duplicate electrical totals and upstream generation emissions from direct site releases.
validate_route	applicability	Substantiate solvent-free adhesive, electrical curing, removable tooling and the unmounted coil gate for the representative route. Other routes require their own atomic exchanges, direct releases and finished-part reference before use.	us20170223463a1-voice-coil
validate_boundary	downstream results	Clearly distinguish gate-to-gate data from a completed cradle-to-gate model. Do not present this part dataset as a complete loudspeaker lifecycle or use it for unqualified comparison of different equipment functions.	wri-wbcsd-product-standard-2011

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset; background_dataset only after declared representativeness and review
downstream_use	Input to assembly of the specified audio/video or electroacoustic equipment; process and lifecyclemodel projections of the collected foreground package
allowed_use	Matching part revision and supply condition, or an explicitly justified technologically compatible part with disclosed adjustments
excluded_use	Automatic substitution for complete equipment, copper wire, generic boards, other part functions, final acoustic service or product use/end of life
required_metadata	Part identity and revision; declared unit and count conversion; intended equipment; site, geography and dates; made/bought stages; process map; allocation; suppliers; logistics; waste treatment; supporting datasets
required_quality_disclosure	Coverage, uncertainty, data gaps, unresolved identities, missing range evidence, primary/secondary data contributions, measurement basis and exclusions
update_trigger	Drawing, conductor, insulation, adhesive, cure route, factory, power supply, yield, supplier boundary or packaging change; new records that invalidate representativeness

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	UNSD, CPC Ver. 3.0 Structure, 30 June 2025. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv ; retrieved 2026-09-09; independence_key: unsd-cpc-3-0-2025	Original rows 47402, 47321, 47323, 47330 and separate component categories; classification and translation scope
un-cpc-3-0-notes-2025	official_guidance	UNSD, CPC Ver. 3.0 Explanatory Notes, 30 June 2025, printed pp. 255–259. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf ; retrieved 2026-09-09; independence_key: unsd-cpc-3-0-2025	Original parent-equipment and parts entries; same underlying classification as the CSV, not independent quantitative evidence
us20170223463a1-voice-coil	literature	US20170223463A1, Voice coil having epoxy-bound winding layers, publication 3 August 2017; description of Figs. 4A and 9, operations 902–908. https://patents.google.com/patent/US20170223463A1/en ; original PDF https://patentimages.storage.googleapis.com/10/88/c4/0487e5cb54c040/US20170223463A1.pdf ; retrieved 2026-09-09; independence_key: us20170223463a1-patent-family	Original technical description: insulated conductor, epoxy application, winding, curing, removable sleeves and subsequent diaphragm attachment; representative decomposition only, no quantitative range or mandated design
wri-wbcsd-product-standard-2011	standard	WRI/WBCSD, Product Life Cycle Accounting and Reporting Standard, 2011, chapters 7–9 and 13. https://ghgprotocol.org/sites/default/files/ghgp/standards/Product-Life-Cycle-Accounting-Reporting-Standard_041613.pdf ; retrieved 2026-09-09; independence_key: wri-wbcsd-product-standard-2011	Original provisions on partial intermediate-product boundaries, allocation and transparent reporting; these principles support this PCR's declared collection rules, not a claim of complete GHG-standard conformity or a full LCIA method