Acoustic transducer having multiple frequency resonance
US4196790A · kind A · utility
10Cited by
5References
9Claims
0Family size
Inventor
Key dates
| Filing date | Mar 27, 1978 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Mar 27, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustic transducer for reproduction of sound over a wide frequency band. The transducer consists of an elongated partially enclosed chamber having a sound source at one end and wherein the cross-sectional area of the chamber is decreased with distance along the length of the chamber away from the sound source. A curved wall is included in the chamber to serve as an expanding horn, the lower end of which is provided with an elongated slot aperture which widens exponentially as a function of the length of the chamber through which sound energy is delivered to the aperture of the horn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.