Apparatus and method for measuring relative frequency response of audio device microphones
US9980070B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2017 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | May 14, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31905
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Test apparatus measuring relative frequency response of first and second microphones includes a rotatable carrier. First and second microphones are sealingly clamped against a mounting surface of the carrier aligned with first and second apertures therein, such apertures lying equidistant from, and on opposite sides of, the carrier's axis of rotation. The carrier initially positions the first microphone closest to an audible signal source, and the responses of the microphones to an audible excitation signal are measured. The carrier is rotated 180 degrees, and the measurements are repeated. Elongated strips of gasket material are used to align the microphones and to form a seal with the carrier. When microphones are mounted deep within an audio device, the audio device is sealingly clamped against a mounting plate, sequentially aligning the mounting plate aperture with first and second apertures of the audio device housing corresponding to first and second microphones disposed therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.