jnoisemeter

Jack app for measurement of audio signals, in particular noise signals

Jnoisemeter is a small Jack app for accurate measurement of audio signals, 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.