Reference
The article delves into the operating principle of sound sensors, focusing on capacitive electret microphones, which convert sound vibrations into electrical signals for data acquisition.
Principle
The sensor converts the vibration caused by sound in the black sound picker into electrical output. It has a capacitive electret microphone which is sensitive to sound. Sound waves cause the thin film of the electret to vibrate and then the capacitance changes, thus producing the corresponding changed voltage, which later will be coverted to a voltage of 0 to 5V and collected by the data acquisition unit after being processed by A/D converter.
Other Supplementary Information
There is a black sound picking device on the sound sensor. When we clap or speak loudly in front of the sensor, it feels the vibration of sound so as to generate electric signal.
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