In some sense, LIGO “hears” gravitational waves. The gravitational wave strain that LIGO detects is at audio band frequencies. Below, are two example gravitational wave sources that we could one day hope to detect along with sound files that you can listen to.
1,1 Solar Mass Binary Neutron Star Merger at ~400 Mpc as seen by LIGO
20,20 Solar Mass Black Hole Merger at ~400 Mpc as seen by LIGO
Using gstreamer to detect gravitational waves
Given that gravitational waves are audio frequency, our group actually uses gstreamer, which is an open source multimedia framework to build huge signal processing pipelines that run on supercomputers. Some of the same technology used to display videos and listen to music on Linux computers is being used to detect gravitational waves. We call the project “gstlal” for Gstreamer LIGO Algorithm Libraries”