Abstract
The micromechanically produced microphone consists of a housing (1) wherein a transducer element (2) is placed and which has a sound inlet (3) on one side of the transducer element and a pressure compensation hole (4) on the other side. In order to protect the microphone against humidity, dust and dirt, which partly or totally will be able to destroy its characteristics, a sealing acoustic membrane (6, 7) is placed on each side of the transducer element. The transducer element can for example be a capacitive transducer with external bias or an electret based transducer. The microphone, which can be produced in very small dimension, is among other things suitable for use in hearing aids.
| Original language | English |
|---|---|
| Patent number | WO1997001258 |
| Filing date | 01/09/1997 |
| Country/Territory | International Bureau of the World Intellectual Property Organization (WIPO) |
| Publication status | Published - 1997 |
