Acoustic apparatus
US5004066A · kind A · utility
30Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1989 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Mar 30, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an acoustic apparatus in which a vibrator which drives a Helmholtz resonator having an open port by one surface thereof and directly radiates an acoustic wave from the other surface thereof is arranged in the Helmholtz resonator, the open port is arranged coaxially with the vibrator, and the vibrator is driven to cancel an air counteraction from the resonator when the resonator is driven. According to this construction, the acoustic apparatus can be rendered compact and the clear sound localization can be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.