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I am using an ICS43434 microphone connected to an ESP-WROOM-32 board and the sensor.community-example-config.yaml script works great but when I compare the measurement values to two of my sensor.community dnms microphones, one using an ICS43434 mic and one with an IM72D128 mic I notice the measurements of the ESP32 are kind of compressed. Same shape, higher low-value, slightly lower high value. I used my 94dB calibrator on the ESP32 mic and it showed 94.27dB. |
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In the You can add microphone specific filters before A-weighting, see README on how to do this. I personally use INMP441 microphone, so those coefficients in README are for this mic (as noted in comments), but there are also coefficients for ICS43434 mic here. Though I haven't tried it myself. I don't remember exactly but I believe DNMS code doesn't apply any mic specific equalization at all. It has only A-weighting. 94 dB vs 94.27 dB seems to be pretty close? |
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In the
community-example-config.yamlthere is no microphone specific filter, there is just A-weighting filter that works with any microphone.You can add microphone specific filters before A-weighting, see README on how to do this. I personally use INMP441 microphone, so those coefficients in README are for this mic (as noted in comments), but there are also coefficients for ICS43434 mic here. Though I haven't tried it myself.
I don't remember exactly but I believe DNMS code doesn't apply any mic specific equalization at all. It has only A-weighting.
94 dB vs 94.27 dB seems to be pretty close?