| Author |
Message |
dale
Guest
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 Posted:
Tue Feb 15, 2005 7:22 pm Post subject:
Re: Speakers for High Frequency Sound |
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< http://www.earthworksaudio.com/f_wpapers/beyond20khz.html >
| Quote: | He's says that this is part of his belief system, and I think he's
telling
it like it is. Thing is, the paper really doesn't provide evidence
that
supports his stated belief.
|
here are the texts he gives as reference found at bottom of paper
An Introduction to the Physiology of Hearing, 2nd edition
James O. Pickles, Academic Press 1988
ISBN 0-12-554753-6 or ISBN 0-12-554754-4 pbk.
Spacial Hearing, revised edition
Jen Blauert, MIT Press 1997
ISBN 0-262-02413-6
Experiments in Hearing, Georg von Békésy
Acoustical Society of America
ISBN 0-88318-630-6
Hearing, Gulick et al
Oxford University Press1989
ISBN 0-19-50307-3
dale
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Robert Baer
Guest
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| Posted:
Wed Feb 16, 2005 6:11 am Post subject:
Re: Speakers for High Frequency Sound |
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dale wrote:
| Quote: |
http://www.earthworksaudio.com/f_wpapers/beyond20khz.html
He's says that this is part of his belief system, and I think he's
telling
it like it is. Thing is, the paper really doesn't provide evidence
that
supports his stated belief.
here are the texts he gives as reference found at bottom of paper
An Introduction to the Physiology of Hearing, 2nd edition
James O. Pickles, Academic Press 1988
ISBN 0-12-554753-6 or ISBN 0-12-554754-4 pbk.
Spacial Hearing, revised edition
Jen Blauert, MIT Press 1997
ISBN 0-262-02413-6
Experiments in Hearing, Georg von Békésy
Acoustical Society of America
ISBN 0-88318-630-6
Hearing, Gulick et al
Oxford University Press1989
ISBN 0-19-50307-3
dale
|
Ignoring the mumble concerning construction of the ear, nerves,
etc--it is known that one can easily detect *phase* differences that
could be interpreted as a 100KHz+ frequency.
Easily described using "first principles" as "where is that damn tiger
that might be stalking me". |
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D.M. Garner
Guest
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| Posted:
Wed Feb 23, 2005 4:16 am Post subject:
Re: Speakers for High Frequency Sound |
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In article <1108165220.798267.223400@c13g2000cwb.googlegroups.com>,
<pooua@aol.com> wrote:
| Quote: | Some people can hear an extremely high-pitched sound generated by
television CRTs and television cameras. I have long wondered what
frequency this sound is. So, I am looking around for test equipment to
help me measure it. I plan to use an audio generator (which I can buy
for about $200), but I need to find a set of headphones that can
produce sound at these high frequencies. The low end frequency should
be about 12 kHz, and I would like to be able to go at least to 50 kHz.
I am guessing the sound is somewhere around 40 kHz.
|
Your guess is way out - what you're hearing is the line frequency
which on European PAL TVs is about 15 kHz. I could hear it until
my mid to late twenties; now at age 32 I can't hear it at all.
However, that might be because new TV's aren't as noisy :-)
I'd be VERY surprised if you could hear anything at all above 20 kHz.
David.
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bruce varley
Guest
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| Posted:
Wed Feb 23, 2005 3:52 pm Post subject:
Re: Speakers for High Frequency Sound |
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D.M. Garner <dmg@eng.cam.ac.uk> wrote in message
news:cvgb04$2tt$1@gemini.csx.cam.ac.uk...
| Quote: | In article <1108165220.798267.223400@c13g2000cwb.googlegroups.com>,
pooua@aol.com> wrote:
Some people can hear an extremely high-pitched sound generated by
television CRTs and television cameras. I have long wondered what
frequency this sound is. So, I am looking around for test equipment to
help me measure it. I plan to use an audio generator (which I can buy
for about $200), but I need to find a set of headphones that can
produce sound at these high frequencies. The low end frequency should
be about 12 kHz, and I would like to be able to go at least to 50 kHz.
I am guessing the sound is somewhere around 40 kHz.
Your guess is way out - what you're hearing is the line frequency
which on European PAL TVs is about 15 kHz. I could hear it until
my mid to late twenties; now at age 32 I can't hear it at all.
However, that might be because new TV's aren't as noisy :-)
I'd be VERY surprised if you could hear anything at all above 20 kHz.
David.
|
Piezo tweeters will generally go to above 20KHz. I've worked a lot with
ultrasonics - way above audible range - you 'hear' it from time to time due
to subfrequencies generated by mechanical nonlinearities around the
transducers, at a much lower frequency. |
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