VERIFIED
Verified Domestic Hum
Primary note repeats under ordinary load and room conditions.
Four seals most often found near a plug
VERIFIED
SAFE-ISH
Ear-Safe Listening
Approved only at the distance printed on the sound passport.
SILENCE
Silence Disputed
Marketing language and field observation remain acoustically incompatible.
INTERIM
Interim Tone Class
Note is repeatable, but sharp/flat or room jurisdiction is under appeal.
Understanding standby sighs
Ordinary release
One short exhale within 12 seconds of cycle completion. No action required.
Reflective standby
Two or three quiet sighs while indicators remain lit. Record if newly developed.
Persistent opinion
Continuous sighing, rising pitch, warmth, or wet sound. Disconnect safely and consult recalls.
Kettle whistle boundaries
Steam-forward label sequence
- K1: local whistle, one room.
- K2: adjacent rooms informed.
- K3: postal-zone notification.
- R: pitch rises continuously.
- P: post-boil whistle persists.
- C: chrome reflection measured.
The official ear remains outside the projected steam path at all times.
Listening distance matrix
| Mark | Minimum distance | Permitted posture | Never combine with |
|---|---|---|---|
| EAR-0 | Ordinary room position | Standing or seated | Direct casing contact |
| EAR-1 | One counter width | Facing sideways | Rotating attachments |
| EAR-2 | Two appliance widths | Behind yellow line | Steam, blades, wet hands |
| REMOTE | Adjacent room | Any sensible posture | Attempting to hear better by opening it |
Industry label licensing
01Declare the exact motor and enclosure family.
02Submit laboratory and domestic field observations.
03Print the passport code without decorative ambiguity.
04Report tonal changes for five registry years.