System consisting of a microphone and an amplifier
US6950529B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 2001 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Apr 6, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Microphone/amplifier system in which the microphone comprises a case with an inlet opening, a diaphragm and a backplate, and the amplifier is arranged in the case and is coupled to the diaphragm/backplate system. In the case, the diaphragm forms a first partition between a first compartment containing the inlet opening to the surroundings and a second compartment accommodating the amplifier. According to the invention, the second compartment is divided by a second partition into a first and second subcompartment, while an opening of a predetermined volume is provided in the second partition, this volume having a magnitude such that air in the first subcompartment can be caused to vibrate only with sound vibrations of low frequencies. Through this feature, the frequency characteristic of the system can be influenced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.