Dispersion of Sound Waves in Ice Sheets « silent listening

The most striking thing about these recordings is the synthetic-sounding descending tones caused by the phenomenon of the dispersion of sound waves. The high frequencies of the popping and cracking noises are transmitted faster by the ice than the deeper frequencies, which reach the listener with a time lag as glissandi sinking to almost bottomless depths. via Dispersion of Sound Waves in Ice Sheets « silent listening.