NetNews Usenet Archive 1992 #31/NN_1992_31.iso/spool/rec/audio/17462

Internet Message Format | 1992-12-29 | 2.0 KB

Path: sparky!uunet!news.tek.com!gvgpsa!gold.gvg.tek.com!chrisc
From: [e-mail] (Chris Christensen)
Newsgroups: rec.audio
Subject: Re: Room treatments
Message-ID: <[e-mail]>
Date: 29 Dec 92 18:56:42 GMT
References: <[e-mail]>
Organization: Grass Valley Group, Grass Valley, CA
Lines: 34

In article <[e-mail]> [e-mail] writes:
>Does anyone have any suggestions for frequency specific as well as
>general room treatments?

>I measured the response of my room yesterday to find a 10db+ peak
>at 54hz (corresponds to my roughly 22 ft long room) plus the harmonics
>plus resonance at the room height and room width, but not as much a peak
>as due to the length.

One poster suggested that a parametric equalizer should be used to
solve this problem.  I have gotten into this before and I will again!
Equalization is useless for control of room modes.

What you have is a room that is resonant at a frequency.  If you have
a speaker that is perfectly flay in frequency and phase response you
will still have the peak.  The use of an equalizer will reduce the
output of the speaker at that frequency but it can't eliminate the
basic cause ofthe problem..........

The devices that are used to treat problems at tha frequency you have
are beyond the simple room tune and other simple surfect treatments.

If you have a good book on acoustics and the solutions, and if you have the
means to build simple construction projects you may be able to take
care of the problem with a bass trap.  The problem is that the trap
may interfere with the architectural aspects of your room.

If you don't have a good book on acoustics I suggest F. Alton
Everest's book "The Master Handbook of Acoustics", second edition. A
basic text that can help you, I believe.
--
Chris Christensen                  The opinions I express are my own,
[e-mail]            and sometimes they are wrong!
916-478-3419 FAX [phone]      After all, I *AM* only human.