Sound absorbing device, electronic device, and image forming apparatus
US9711125B2 · kind B2 · utility
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1References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 13, 2016 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Jun 13, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1619
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A sound absorbing device including a Helmholtz resonator having a projection part which includes a shape of protruding from an outer wall surface of a communicating part forming plate among the communicating part forming plate and a cavity forming member that are cavity part forming members forming a cavity part of the Helmholtz resonator, and surrounding an opening of a communicating part that causes the cavity part to communicate with the outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.