Life safety device with compact circumferential acoustic resonator
US9552705B2 · kind B2 · utility
12Cited by
48References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2016 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Apr 14, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Low frequency alarm tones emitted by life safety devices are more likely to notify sleeping children and the elderly. Disclosed herein is a life safety device equipped with a novel, compact, circumferential resonant cavity which increases the low frequency (400-600 Hz square wave) acoustic efficiency of an audio output apparatus formed by acoustically coupling an audio output transducer to the resonant cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.