About echo experiment sound results of 10,000
04:50
06:33
06:13
07:55
05:42
09:51
05:18
06:18
06:10
06:36
06:39
06:20
05:22
08:46
05:32
06:19
05:39
06:16
05:29
06:01
05:14
05:14
05:44
06:17
06:19
05:16
05:03
05:06
06:32
05:36
05:19
06:35
05:52
05:42
06:10
05:22
06:30
05:49
04:41
08:22
06:32
06:26
04:23
51:17
24:19
15:29