P1.9.19 Digital MEMS Microphone with Inter-IC Sound Interface for Photoacoustic Spectroscopy

Henry Bruhns, André Marianovich, Stephan Rhein & Marcus Wolff
In Photoacoustic Spectroscopy that is adopted for gas sensing, standard condenser microphones are usually used to detect the pressure variation inside of the sample cell. We present the application of a new commercial I2S digital MEMS microphone that is enhanced with a filter and an analog to digital converter in a single package. The utilisation of the described MEMS microphone together with an embedded microcontroller would significantly reduce the required space and costs for the...