Personal ambient sound referenced annunciator
US4297677A · kind A · utility
48Cited by
16References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 10, 1979 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Dec 10, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/91
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A personally worn or portable annunciator device for alerting, warning, training, communicating or diagnostic use for people especially those with hearing impairments. This device which can be activated locally or remotely has as one of its means of generating a tactile sensation a transducer or buzzer, as well as a visual light both of which are activated automatically upon the detection of an audio signal substantially above the local ambient noise, or by a RF signal remotely generated by an auxiliary unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.