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- Xref: sparky comp.sys.atari.st:13661 rec.audio:12409 sci.skeptic:16317
- Newsgroups: comp.sys.atari.st,rec.audio,sci.skeptic
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!sgiblab!tsoft!ruscal
- From: bbs.ruscal@tsoft.sf-bay.org (Russel Mar)
- Subject: Re: sampling and human hearing range (was Re: (none))
- Message-ID: <JT0yqB3w165w@tsoft.sf-bay.org>
- Sender: bbs@tsoft.sf-bay.org (BBS User)
- Organization: The TSoft BBS and Public Access Unix, +1 415 969 8238
- References: <BuG1wq.85E@world.std.com>
- Date: Sat, 12 Sep 1992 07:40:06 GMT
- Lines: 45
-
- dmoran@world.std.com (david r moran) writes:
-
- > In article <1992Sep11.173910.279@u.washington.edu> mpark@milton.u.washington.
- > >In article <2250287@overmind.citadel> only_bbs!JOHN_LOCKARD@overmind.mind.or
- > >...
- > >> Between the sampling rates of twice the freqency and four times
- > >> the freqency of the sine-wave you get complex phase, frequency,
- > >> and amplitude distortions that aren't easy to filter out.
- > >>
- > >> That's why to get the 35KHz wave that the human ear is supposed
- > >> to detect you need at least 100KHz or more to reproduce the sound.
- > >
- > >Does anyone have a reference to the [British?] research that
- > >supposedly demonstrates that the ear can detect "nuances" in
- > >sound up to 35kHz? Or any research that demonstrates that the
- > >conventionally-accepted human hearing range (~20Hz to ~20kHz)
- > >needs to be reconsidered?
- > >How about the idea that signals must be sampled at _three_ times
- > >their highest frequency?
- > >
- > >[newsgroups: comp.sys.atari.st - where this started
- > > rec.audio - surely some audiophile knows a reference
- > > sci.skeptic - to keep the audiophiles honest :^)
- > > can't decide where to followup-to...]
- > >
- > >
- > >
- > >--
- > >Ciao-abunga! +-------------------------------------+
- > >Michael Park | This space intentionally left blank |
- > >mpark@u.washington.edu +-------------------------------------+
- >
- >
- > This is all bullshit. What such people need (among other things) is
- > to get an audiogram. First things first: what one can and cannot hear.
- > Test self before posting. Or writing in a magazine.
-
- =======================
- Having used a Hybrid Arts (R.I.P.) ADAP sampler, I can tell you that the
- accepted minimum requirement is to sample at 2x the max. freq. you want
- to reproduce/record. If you are baffled, look up the Nyquist Theorem;
- CD's sample at 44.1k and DAT at 48kHz for this reason also.
-
- --
- Russel Mar (bbs.ruscal@tsoft.sf-bay.org)
-