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Further to an earlier comment, this chap has been working on the theory that early cave paintings were in acoustically significant locations
https://sites.google.com/site/rockartacoustics/ Listen to sounds on the appendix page as the links are bung control is https://sites.google.com/site/rockartacoustics/home/ifrao-sound-files/Waller_Thunder_ControlNoReverb_SoundRecordingR090113.wav?attredirects=0&d=1 with echoes is https://sites.googlegroups.com/site/rockartacoustics/home/ifrao-sound-files/Waller_Thunder_Oiseau_SoundRecordingR090002.wav?attredirects=0&d=1 I have had some amazing 1-2 sec looping fun in cave systems and in dam tunnels |