Subject: Re: [linux-audio-user] sampling at high frequencies
From: Erik de Castro Lopo (erikd-lad_AT_mega-nerd.com)
Date: Mon Jan 26 2004 - 12:43:33 EET
On Mon, 26 Jan 2004 10:19:59 +0100
Joern Nettingsmeier <nettings_AT_folkwang-hochschule.de> wrote:
> people can't hear over 20k. period. 48k sampling rate gives you 24k
> minus what's cropped off by the aliasing filter.
Thats not the full story. There was a Japanese study where untrained
listeners could tell the difference between 10kHz sine waves and 10kHz
square waves in double blind tests. That means that the listeners
could tell presence or absence of the 30kHz third harmonic of the
square wave.
Theroretically this should not have been possible which indicates that
theories of hearing perception are far from complete.
Erik
-- +-----------------------------------------------------------+ Erik de Castro Lopo nospam_AT_mega-nerd.com (Yes it's valid) +-----------------------------------------------------------+ "MS apparently now has a team dedicated to tracking problems with Linux and publicizing them. I guess eventually they'll figure out this back fires..." -- William Burrow
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