1. You can adjust the volume with the volume slider1.

1. 文件(F)1 > 首选项(P)2 > 音频3
2. Click button4
3. Follow instructions in Soundpad
4. Click stop button to finish measurement

The voice volume should be above 74 dB, otherwise certain voice applications may filter out played sounds misinterpreting them as background noise. If your measured voice volume is lower than 74 dB, it is recommended to increase the overall microphone volume in Windows.