ADAU1761 self-oscillation in a megaphone
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I use ADAU1761 as Microphone pre-amlifier and signal processing for a megaphone project. System total gain is about
36dB. it get horrible self-oscillation when speaker sound feed back to MIC, How can i kill the self-oscillation? Does ADAU1761 has frequency sift tool?analog-admin
Audio Signal Processors
SigmaDSP Audio Processors
adau1761
Hello,
Yes, you can try the Pitch Modification algorithm shown below to see if it can reduce your self-oscillation ("feedback"). This frequency-shift algorithm doesn't work well enough to serve as a key changer for music, but may prove adequate for voice when used in a megaphone. The larger the reserved delay, the better it sounds.
Best regards,
Bob
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