Pronounced [ahy-on-uh-sond] ; A scientific apparatus that measures the reflectivity of the ionosphere, the outer must layer of the earth that protects us from cosmic radiation and aids in global communication.

Ionosonde Recordings is a netlabel from Detroit Michigan U.S.A. It was created by sound artist and producer Telegraphy in January of 2011. Ionosonde releases freely accessible experimental electronic music and visual media under the Creative Commons license.