Microphones

The microphones we use are high quality low cost electret microphones. They are particularly well adapted to create low cost high channel count antenna (the more mics the more robust the results!).
Their frequency response curve is perfectly flat up to 5 000 Hz and shows little variation +/- 2 dB up to 15 kHz. For higher frequency need we can linearize the frequency response with measurements against a class one mic...

The variations of phase are low (see Humphreys's article) and to illustrate the influence of these variations, you can have a look at this page.
These microphones can be used for numerous applications !
Our set of mini-microphones. Ech microphone has the same characteristics as the above mic except that we have made them as small as possible to fit them into very small spaces !

Frequency response curve (Hz)