sound module testing

Figure 1: sound module

I had bought sound module for sound acquisition. It need 3.3V to 5V and <10mA for working. It can adjust the sensitive by changing angle of bolt hole

Figure 2: output of sound module (no sound)

Figure 3: output of sound module (sound pulse)

Figure 4: output of sound module (no sound pulse)

Figure 5: output of sound module (sound pulse)

Figure 6: output value of sound module

Serial monitor with baud rate 9600 Hz
It can be detecting the sound by detecting voltage level at output pin in sound module