Using a mighty small hammer!
If you really really concentrate, you can hear the cement vibrating at a molecular level.
File type: audio/wav
File size: 1 KB
Length: 0:000 minutes, 0 seconds
Bitrate: 88kb/s CBR
File type: audio/wav
File size: 1 KB
Length: 0:000 minutes, 0 seconds
Bitrate: 88kb/s CBR