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40Hz
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This is what 30 minutes of a 40 Hz tone sounds like.
40 Hz tone generated using Audacity. Converted to MP4 using OpenShot Video Editor.
40 Hz tone generated using Audacity. Converted to MP4 using OpenShot Video Editor.
0:30:07
2:00:36
![[ 40Hz ]](https://i.ytimg.com/vi/Z8ANihFXlgU/hqdefault.jpg)
2:00:00
0:05:00
0:01:00
0:00:02
2:00:09
1:30:01
0:15:01
1:00:01
2:00:02
1:00:23
0:57:50
1:00:26
1:30:16
1:00:00
2:01:44
2:01:02
0:10:00
0:00:26
4:02:45
1:00:07
0:00:25
2:00:01