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Path: utzoo!linus!philabs!seismo!hao!hplabs!hp-pcd!tekmdp!michaelk
From: michaelk@tekmdp.UUCP
Newsgroups: net.audio
Subject: Re: Orphaned Response - (nf)
Message-ID: <1721@hp-pcd.UUCP>
Date: Sun, 4-Sep-83 03:35:51 EDT
Article-I.D.: hp-pcd.1721
Posted: Sun Sep  4 03:35:51 1983
Date-Received: Mon, 5-Sep-83 20:42:00 EDT
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Organization: Hewlett-Packard, Corvallis OR
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#R:tektroni:0:tekmdp:-1:37777777600:816
tekmdp!michaelk    Jul 29 16:58:00 1983

How much phase shift does a "typical" speaker system introduce ( I have
AR9 and B&O M100 speakers if you know those numbers) as compared to 
the phase shift in a CD player?  Kim Rochat mentioned 180 degrees at
20 KHZ for some CD player (I have a SONY).  It seems to me
that if I move my head back (from the speakers) about 0.3 inches, that
I have caused a 180 degree phase shift at 20Khz, but less than 10 degrees
shift at 1KHz, so does a 0.3 inch headmovement have the same effect as
the total error in the CD player process or am I missing something?
Anyway, how much phase shift is caused by the speakers, and how much
by headmovement, and how do these compare in maginitude to the shift
caused by a CD at very high (audio) frequencies?

Mike Kersenbrock
Tektronix Microcomuter Development Products
Aloha, Oregon