Acoustic apparatus with plural resonators having different resonance frequencies
US5010977A · kind A · utility
15Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Jul 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An acoustic apparatus comprises a plurality of resonators having different resonance frequencies, each of which is constituted by a closed cavity and acoustic mass for causing the cavity to acoustically communicate with an external region. A housing enclosing the plurality cavities is integrally formed. Resonance acoustic radiation portions of the resonators are arranged adjacent to each other on one side of the housing, whereby sound sources which correspond to the acoustic mass can be concentrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.