The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Don Pearce
Subject: Re: Phase Detection Of Acoustic Frequencies
Date: Sun, 08 Dec 2002 16:13:37 +0000
NNTP-Posting-Host: host217-39-125-198.in-addr.btopenworld.com (18.104.22.168)
X-Newsreader: Forte Agent 1.91/32.564
On 8 Dec 2002 07:55:45 -0800, TOF71X@Yahoo.com (Dillion) wrote:
>I am needing to detect the phase differences between 2 acoustic
>frequencies having displacements of 1 to several hz, in an overall
>bandwidth of 20hz-10khz. I have been told that a circuit based around
>the NE/SE567 IC might be what I need to use. I was curious if there is
>an off shelf inexpensive phase detector/amplifier that might
>accomplish this task? Something I can just go and purchase and get it
>over with. If not, can the NE/SE567 be used basically by itself, with
>just a power supply and the audio inputs & outputs going to/from the
>proper pins on the IC in a simple circuit board? If not, are there any
>kits out there that would get this done? Sorry for the dumb questions.
>I would appreciate any help I can get regarding this matter. Thank
If your tones are of differing frequencies, then phase difference is a
pretty much meaningless concept. The phase is constantly changing all
the way from 0 to 360 degrees, at a rate of (2pi radians times the
frequency difference) per second.
Can you re-formulate the problem in a way that makes sense for phase
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup