Attempted to run the FFT analyzer in the example Spresense sketch.
Microphone acquisition of sound from ultrasonic waves (20 kHz to 50 kHz)
A digital filter attenuates the low frequency band (less than 20 kHz) and amplifies the ultrasonic region (less than 20 kHz)
Is it possible to draw the results on the LCD in real time in terms of the specification of Spresense?
I would appreciate it if you could let me know
Product Configuration
·Main & Expansion Foundation
·LCD display
·MeMS microphone (analog) for ultrasonic waves
- I'd like to try a digital microphone later.
There seems to be a sample FFT analyzer for the following Github up to 192 kHz.
https://github.com/TE-YoshinoriOota/Spresense_fftanalyzer_sample
Since the setting of the high pass filter is 20 kHz, isn't it possible to do what you want?
For your information.
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