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missing frenquencies
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<blockquote data-quote="TimeFlipper" data-source="post: 185455" data-attributes="member: 6456"><p>I believe if you chose a sine-wave frequency of 7.83hz, it would activate/resonate that part of the brain which produces Theta Waves (4 to 8hz) producing a first stage of sleep and drowsy state.....Using a pulse wave is an interesting idea Cobber!....Acoustically as far as i can see, it would be necessary to restrict the harmonic levels for obvious reasons of interfering with the fundamental frequency of 7.83hz., and the brains response to those harmonics..</p><p></p><p>On Ebay there is a (Signal Generator PWM Pulse Frequency Duty Cycle Adjustable) device, covering 1hz to 150khz that is Very Very Cheap!!...The adjustable duty cycle controls the amount of harmonics, i mentioned in the above paragraph...PWM means Pulse Width Modulation...Below is a video of Steve Winwoods song-While You See a Chance, where he uses PWM on the keyboard...Listening to that song on headphones gives a better idea of how the PWM can actually "affect" you mentally.....If the video doesnt show up for you, go on You Tube and type in, Steve Winwood-While You See a Chance <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite38" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />..</p><p></p><p>[MEDIA=youtube]0j6g_uUhH2c[/MEDIA]</p></blockquote><p></p>
[QUOTE="TimeFlipper, post: 185455, member: 6456"] I believe if you chose a sine-wave frequency of 7.83hz, it would activate/resonate that part of the brain which produces Theta Waves (4 to 8hz) producing a first stage of sleep and drowsy state.....Using a pulse wave is an interesting idea Cobber!....Acoustically as far as i can see, it would be necessary to restrict the harmonic levels for obvious reasons of interfering with the fundamental frequency of 7.83hz., and the brains response to those harmonics.. On Ebay there is a (Signal Generator PWM Pulse Frequency Duty Cycle Adjustable) device, covering 1hz to 150khz that is Very Very Cheap!!...The adjustable duty cycle controls the amount of harmonics, i mentioned in the above paragraph...PWM means Pulse Width Modulation...Below is a video of Steve Winwoods song-While You See a Chance, where he uses PWM on the keyboard...Listening to that song on headphones gives a better idea of how the PWM can actually "affect" you mentally.....If the video doesnt show up for you, go on You Tube and type in, Steve Winwood-While You See a Chance :).. [MEDIA=youtube]0j6g_uUhH2c[/MEDIA] [/QUOTE]
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