Development of a piston type condenser microphone for reconfigurable acoustic arrays

Konferenz: Smart Systems Integration 2008 - 2nd European Conference & Exhibition on Integration Issues of Miniaturized Systems - MOMS, MOEMS, ICS and Electronic Components
09.04.2008 - 10.04.2008 in Barcelona, Spain

Tagungsband: Smart Systems Integration 2008

Seiten: 3Sprache: EnglischTyp: PDF

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Calaza, Carlos (FBK-irst, MemsRad Group, Trento, Italy)

This work presents an innovative method to achieve piston type capacitive silicon microphones suitable for reconfigurable acoustic arrays. The primary advantage of silicon based microphones is the high degree of miniaturization achievable, which together with the reproducibility of the transducer characteristic provides great compatibility with batch production at low cost. Piston type capacitive microphones offer better electro-acoustical transduction than membrane type ones, and can be easily packaged as there is not need for a static pressure balancing. Their ability to be co-integrated with preamplifier circuitry reduces parasitic capacitances and further enhances microphone performance, becoming a very appealing solution for complex audio applications where weight, compactness and reliability are crucial.