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My microphone cannot capture high frequency sound 2 years 8 months ago #54725

  • doanthu249
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I am using UMA-8-SP USB mic array. Unfortunately, my microphone cannot capture sound that has high pitch because somehow it is capped at around 7.5 or 7.6 kHz. Specifically, I have a chirp file which has frequency range from 15 kHz to 20 kHz, while my laptop's microphone can capture the full range of the chirp, UMA-8 cannot.
This is what the spectrogram of the chirp, the recorded file by UMA-8 and by my laptop's microphone look like:
I also enclose the chirp file and the two recorded files in the above drive folder for your reference.
I record the sound using this tool, this is a built-in tool for all Win 10.

Also, I found another case similar to mine from this forum and they shared their files here in this post:
I try plotting the spectrogram from their shared files and discover that their mic was also capped at the same frequency, 7.5-7.6 kHz.
Please refer to this drive to see the spectrograms:

My code in python to show the spectrogram:

Is there a way to extend this 7.5 kHz threshold (as the original post does not show any related answer), or is this a problem of UMA-8?

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