Ice music

I forgot to mention today about hearing the ice sing while skating. Beautiful (and loud). Here's an analysis by an acoustical engineer, Gunnar Lundmark, relating tone frequency to ice thickness. I guessed - with my less than perfect ear - that today's tone was A4. According to wikipedia that's 440 Hz which would correspond to about 7.5 cm of ice. The ice was reported to be 9 cm which should have produced something closer to a G4. Amply within my margin of error.

From Gunnar Lundmark's site you can link to sounds of ice music. Try the sound of thin ice and the sound of too thin ice.