Eye glass hearing aids
US4451709A · kind A · utility
17Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1981 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/65
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An eyeglass hearing aid including a channel having a serpentine shape for providing a compact acoustical path for extending the path of sound transmission. A sweat guard is positioned around a volume control aperture formed on the upper surface of the eyeglass aid. Alignment structure serves to fix a curved printed circuit board in position relative to the flat lower surface of the paddle portion of the eyeglass aid. These particular structures are incorporated in an eyeglass hearing aid in order to utilize a printed circuit board of a behind-the-ear hearing aid and to provide the same frequency response as a behind-the-ear aid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.