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Bell Speakers, A hypothetical
danielm
post Jul 7 2012, 18:13
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Okay, so I hope this is the right place to post this, but I had an idea (and very little actual know-how) and wanted to know what people in the know thought of it. Okay, so here goes... stop me if any of my presumptions are faulty, but...


(1) recorded music is just a complex waveform over time (different frequencies superimposed on one another)
(2) "regular" speakers recreate this with an electromagnet and a diaphragm...

so here is the idea... could a recording of, say, a person singing, be discernibly (not perfectly by means) reproduced using a rig as described below.

(1) x number of precisely tuned bells, such that, given the available frequencies, most frequencies within the human hearing range can be more or less recreated by some combination (i know there is an embedded math problem, but my uneducated instinct says some application of the birthday paradox (http://en.wikipedia.org/wiki/Birthday_paradox)) of the given bells
(2) each bell fitted with an individual ringing mechanism (servo motor?), possibly something resembling a bicycle spoke with multiple strikers on a wheel that can be spun quickly to emulate some sustain.
and
(3) a computer and program to translate the given audio file into something the bell rig can play.




Do you think this is possible? Are there any huge holes in my logic or understanding? Something I am not thinking of? Bear in mind you are speaking to someone who studied russian lit and only has a passing familiarity with this stuff. Thanks in advance for your time or comments.
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dhromed
post Aug 21 2012, 13:43
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Some googling tells me that the overlap is significant and the response rolloff rather shallow (see bottom image, fig 12.8).

In any case, the ear is like a 1-pixel eye that responds to many frequencies, while the eye has many pixels and only three frequencies.

So, back to your original point, you can get proper sound by combining sine waves (after all, this is essentially what lossy audio compression is based on), but I still would not call it "in the same way as primary colors", since audio is a plain mapping of frequency onto reponse and vision is about combining relative intensities of three values.

Lossy image compression of the jpeg variety also exploits decomposition into frequencies, but this happens in the spatial domain, per-channel and after a transform of RGB to Lab, so again, I don't want to compare audio and vision so easily and prefer to keep similes like that out of the discussion.
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Posts in this topic
- danielm   Bell Speakers   Jul 7 2012, 18:13
- - pdq   First off, you would need to be able to stop each ...   Jul 7 2012, 18:47
- - danielm   how disappointing, thanks pdq   Jul 7 2012, 18:54
- - markanini   Sounds fun but it couldn't possibly be hi-fi. ...   Jul 7 2012, 19:00
- - danielm   markanini, yes, hi-fi is not the goal at all. God ...   Jul 7 2012, 19:04
- - Kees de Visser   It's an interesting idea for sure. A similar a...   Jul 7 2012, 19:41
|- - danielm   QUOTE (Kees de Visser @ Jul 7 2012, 20:41...   Jul 7 2012, 21:10
|- - dhromed   Next step is the reverse: are there people trained...   Jul 8 2012, 20:57
- - mixminus1   Michael Winslow - who played Larvell Jones in the ...   Jul 8 2012, 22:31
- - mzil   I suspect the piano speaking video is fake. [Altho...   Jul 9 2012, 00:16
|- - mzil   QUOTE (mzil @ Jul 8 2012, 19:16) I suspec...   Aug 15 2012, 00:04
- - Dynamic   Bizarre as it may seem I think it's probably r...   Jul 9 2012, 09:09
- - DVDdoug   QUOTE (1) x number of precisely tuned bells, such ...   Jul 9 2012, 18:45
|- - Porcus   QUOTE (DVDdoug @ Jul 9 2012, 19:45) It...   Jul 10 2012, 05:13
|- - dhromed   QUOTE (DVDdoug @ Jul 9 2012, 19:45) DFT =...   Jul 10 2012, 09:02
- - benski   But an FFT has both a magnitude component and a ph...   Jul 9 2012, 19:36
- - 2Bdecided   Of course its possible. The question is only how b...   Jul 10 2012, 10:16
- - danielm   Okay, i get that bells ring at a number of frequen...   Jul 17 2012, 00:13
- - 2Bdecided   They are all always ringing at multiple harmonics....   Jul 17 2012, 10:32
- - knutinh   Actually, the Hammond organ predates the additive ...   Aug 15 2012, 08:12
|- - Porcus   QUOTE (knutinh @ Aug 15 2012, 09:12) When...   Aug 15 2012, 08:37
|- - knutinh   QUOTE (Porcus @ Aug 15 2012, 09:37) QUOTE...   Aug 15 2012, 09:54
|- - Porcus   QUOTE (knutinh @ Aug 15 2012, 10:54) One ...   Aug 20 2012, 13:29
- - zima   Somehow this thread reminded me about http://en.wi...   Aug 18 2012, 06:15
- - DonP   This is a hipshot speculation to spur discussion. ...   Aug 20 2012, 16:19
|- - Porcus   QUOTE (DonP @ Aug 20 2012, 17:19) Doesn...   Aug 20 2012, 16:58
- - dhromed   QUOTE Anyway, it would seem that with the correct ...   Aug 20 2012, 17:20
|- - DonP   QUOTE (dhromed @ Aug 20 2012, 12:20) QUOT...   Aug 21 2012, 12:54
- - dhromed   Some googling tells me that the overlap is signifi...   Aug 21 2012, 13:43


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