| 发明名称 |
PASSIVE ACOUSTICAL FILTERS WITH FILLED EXPANSION CHAMBER |
| 摘要 |
A passive acoustical filter includes a first opening to receive ambient sound, a second opening to output filtered sound, and a first low pass filter element coupled between the first opening and the second opening. The first low pass filter element includes a first expansion chamber filled with a material in which a speed of sound is lower than a speed of sound in air. |
| 申请公布号 |
US2015312671(A1) |
申请公布日期 |
2015.10.29 |
| 申请号 |
US201514793961 |
申请日期 |
2015.07.08 |
| 申请人 |
Doppler Labs, Inc. |
发明人 |
Wiggins Dan;Oswaks Jonathan |
| 分类号 |
H04R1/10;G10K11/16;H03G9/02;G10L21/0232;H04R1/22 |
主分类号 |
H04R1/10 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A passive acoustical filter, comprising:
a first opening to receive ambient sound; a second opening to output filtered sound; a first low pass filter element coupled between the first opening and the second opening, the first low pass filter element comprising a first expansion chamber filled with a material in which a speed of sound is lower than a speed of sound in air. |
| 地址 |
New York NY US |
