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The quick way to know if you are on a linear concentration of sound is to see if you can get resonance with one of the higher harmonics that are in the audible range.

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Welcome to Rory Duff, author of the month for April 2020 1040 Graham Hancock 03-Apr-20 09:58
Re: Welcome to Rory Duff, author of the month for April 2020 307 seasmith 03-Apr-20 15:27
Re: Welcome to Rory Duff, author of the month for April 2020 290 thegeobiologist 03-Apr-20 15:52
Re: Welcome to Rory Duff, author of the month for April 2020 278 seasmith 03-Apr-20 22:40
Re: Welcome to Rory Duff, author of the month for April 2020 280 thegeobiologist 04-Apr-20 05:44
Re: Welcome to Rory Duff, author of the month for April 2020 307 Susan Doris 05-Apr-20 13:53
Re: Crop circle energy query 311 Edmond 06-Apr-20 10:03
Re: Crop circle energy query 236 thegeobiologist 16-Apr-20 08:26
Rather omit dating speculation 258 Edmond 16-Apr-20 09:05
Re: Welcome to Rory Duff, author of the month for April 2020 230 thegeobiologist 16-Apr-20 08:29
Re: Welcome to Rory Duff, author of the month for April 2020 247 Susan Doris 16-Apr-20 11:42
Re: Welcome to Rory Duff, author of the month for April 2020 300 michael seabrook 08-Apr-20 21:02
Re: Welcome to Rory Duff, author of the month for April 2020 252 thegeobiologist 16-Apr-20 08:15
Re: Welcome to Rory Duff, author of the month for April 2020 363 michael seabrook 16-Apr-20 14:05
Re: Welcome to Rory Duff, author of the month for April 2020 271 Susan Doris 13-Apr-20 09:13
Re: Welcome to Rory Duff, author of the month for April 2020 292 thegeobiologist 16-Apr-20 08:12


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