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Amazon.com: DKARDU 2PCS DC 5V-12V Mini Microphone Amplifier Board Micro Electret Amplifier MIC Condenser Amplifier Module with 2PCS Electret Microphone, 2PCS Power Cable : Musical Instruments
![audio - Getting opposite expected voltage with electret microphone - Electrical Engineering Stack Exchange audio - Getting opposite expected voltage with electret microphone - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/MXCcp.png)
audio - Getting opposite expected voltage with electret microphone - Electrical Engineering Stack Exchange
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