OPEN DOMESTIC SOUND DATA / RELEASE 2026.3LAST CRUMB ADJUSTMENT: 04 AUG
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National Register of Domestic Appliance Frequencies

Reports, public data extracts, corrections, declarations, and methods.
DATASETS42PUBLIC
Portable domestic frequency data instrument
PUBLICATION ROOM / MACHINE-READABLE-ISH

Measured, counted, corrected, and over-labeled.

The register publishes aggregate frequencies and record-level sound passports without household addresses, private recordings, or personally identifiable kettle habits.

RECORDS48,291
ROOM CLASSES19
NOTE FAMILIES88
CORRECTIONS1,403
DECLARATIONS9,211
UNEXPLAINED711

Quarterly domestic spectrum

Records by principal behavior

Completeness indicators

92%
ROOM
81%
NOTE
66%
CRUMB
97%
KNOB

Featured downloads

National Hum Wheel

Printable room-to-note comparison wheel, revision 6.

READ THE GUIDE
Countertop Register

Current certified oscillator extract and field definitions.

VIEW RECORDS
Recall Digest

Active, closed, and label-only frequency notices.

VIEW NOTICES
Listening Methods

Distances, repeats, and crumb-normalization protocol.

VIEW METHODS

Open data coverage

Included fields

FieldCoverageUnit
Passport code100%NR sequence
Primary note81%Domestic scale
Room class92%Controlled vocabulary
Listening distance88%Metric / object-relative
Knob sincerity97%Declared scale
Mechanical decibel data abacus

Corrections and revision ledger

ReleaseChangeRecordsReason
2026.3bSteam Tower K2 to K364Postal range understated
2026.3aWet-lamp behavior added18Field repeat confirmed
2026.3Crumb baseline revised8,441New national toast reference

Industry declarations

Declaration principles

Manufacturer evidence remains visibly distinguished from independent field listening. A declared note becomes certified only after a domestic repeat or accredited laboratory review.

Prepare a manufacturer dossier.

Publication calendar

Monthly: corrections and active notice list.
Quarterly: public register extract.
Annually: State of the Household Hum.
Irregularly: urgent biscuit circulars.