Install jnoisemeter by entering the following commands in the terminal:
sudo apt update sudo apt install jnoisemeter
Description:
audio test signals meter
A jnoisemeter is a small app designed to measure audio test signals and in particular noise signals. . The simplest use is to measure the S/N ratio of your sound card. If you can calibrate the input levels of your soundcard it can also be used (with some external hardware) to measure noise levels of any type of audio equipment, including preamps and microphones.
Homepage: http://kokkinizita.linuxaudio.org/linuxaudio/downloads/index.html
Version: 0.1.0-4
Section: universe/sound