Ancient Architectural Acoustic Resonance Patterns and Regional Brain Activity

Ingenta Connect ^ | 3-2008 | Cook, Ian A.; Pajot, Sarah K.; Leuchter, Andrew F.

[BenLurkin]

Interesting.

[Renfield]

I beat you to it! I found NCH and downloaded their tone generator. So, I set it it at 110hz, and here is what I found:

110 hz is not a “very, very deep base” tone. I’d call it a baritone tone; I can easily hum it. I also was struck by how familiar the tone sounded; then, I realized where I’d heard it. It’s the first note George Harrison hits on his guitar in the beatles tune “I Feel Fine” (just to make sure, I played my .mp3 file of the song...yep, it’s the frequency of the first note of the song!)

[Jedi Master Pikachu]

Whoops. Used locus instead of foci.

Appreciated.

[willgolfforfood]

Terrific! That's one theory anyway.

I had a friend in college, an engineering buddy with a hearing defect. He couldn't hear ANYTHING above about 700 Hz. He had trouble listening to men talk in class, but he was very smart, and still pulled about a 3.5 GPA out of 4.0 in his electrical engineering major. There were very few women that he could even hear them talk. Looking back, I don't know whether to envy him or not.

Anyhoo, most speech therapists test hearing for kids at about 1000 Hz up to 4-5000 Hz - the range of human speech. It's possible to test outside of that range - I have been tested much higher than that, just for grins. But they are testing for kids to confirm that they are able to hear the teacher in class, and converse with a normal speech person.

Obviously, 100 Hz is only 1/10 of the bottom range I just described. This is subwoofer range on a stereo/audio system. Subwoofers generally play the lowest possible frequency your amp will put out. Maybe only 12-20 Hz at the absolute low end, up to 200-300 Hz. Hence my reference of deep, deep base. Any mid-range speaker cone can't even pretend to try to play a tone of 100 Hz.

Way back in the day, I had an album that played all types of tones, as an amplifier/speaker test. I believe the lowest tone it had on it was 500 Hz, but it's been a long time, like 25 years + that I used it.

[perfect stranger]

http://www.world-voices.com/software/nchtone.html

[perfect stranger]

I’m curious. Got any more info for them?

[RightWhale]

I'm not AT ALL certain anyone can speak in the nominal 100 HZ frequency

Drums. Boom.

[willgolfforfood]

I’ve played drums, but it’s been some time. Subwoofers kicking hard to make a base drum light up with some realistic punch off a CD can REALLY make it sound just like you’re right behind the base drum.

[SunkenCiv]

There's a segment about research into ancient sonic stuff on this disk (which I recommend anyway, not a run-of-the-mill, gee-whiz kind of disk):

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Mysteries of the Ancient World

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[SunkenCiv]

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[null and void]

Hmmmmmmmmm, 110 Hz.

That’s darn close to the frequency doubled 60 Hz hum one hears near a transformer, etc.