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My microphone cannot capture high frequency sound 7 months 1 day 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:
drive.google.com/drive/folders/19b9YGc2p...XDWNczmi?usp=sharing
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.
support.microsoft.com/en-us/windows/how-...da-a9a4-0bcb84a778e7


Also, I found another case similar to mine from this forum and they shared their files here in this post:
www.minidsp.com/forum/usb-mic-array/1342...expected-audio#32734
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:
drive.google.com/drive/folders/1XFkg5dGD...K0EwvtyA?usp=sharing

My code in python to show the spectrogram:
drive.google.com/file/d/1e4UeHRbetI2eop4...dSM/view?usp=sharing


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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