PSN-L Email List Message

Subject: Re: Cheap accelerometer & HUMMMMMMM
From: walt_williams@........
Date: Thu, 16 Dec 1999 23:00:35 -0800


Hello John, Peter, et al,

Sounds to me that your 'wacko' (sorry to hear that he has become 
a 'jerk' as well), is operating in 'desperation' more than in 
'wacko' mode. 

I had a similar problem in my neighborhood with a milk 
(pumping) distribution plant (I expended three years to determine 
the cause) which was located five blocks from my residence.  On 
any day I could hear an infrasonic sound emanating from the walls 
of my house, especially in my bedroom at night. Yet going outside 
I could not hear the sound?  I discovered that by being inside an 
enclosure, I could hear the sound anywhere in the neighborhood in 
which I resided. On cold days I could hear the sound better. 

To make matters worse, no one else could hear the sound at my
residence?!? Nor could my neighbors. Fortunately for my personal
sanity, a friend visited and entering my residence, he exclaimed,
"What is causing that hum?" A reprieve from the loony bin!  :))

Ear-plugs did not attenuate the problem and when the police came
out (several times) they couldn't hear anything either (their 
faces had that 'wacko' detection look), yet inside my body-cavity 
and my ears were 'ringing' with pressure as the peace officers 
were doing their report! Very frustrating. 

Sitting inside the cab of my K5 Blazer truck with engine off I 
could hear the sound, but not outside of the truck. By driving 
down the street, stopping, turning the motor off, listening, 
restarting, driving, stopping, et cetera, ad nasuem, I was able 
to finally determine location of the sound. This process required 
much effort as the sound seemed to be 'everywhere'. 

I caused remedy by pestering the Los Angeles County Building and
Safety Department, which required many telephone calls to
decipher the correct necessary terminology as well as determining 
the proper people. There is a sound pressure regulation for 
residential neighborhoods and the Building and Safety people have 
an aural spectra survey instrument to determine compliance of 
energy sources with the regulations, and they will conduct 
surveys if asked properly.  

John, perhaps you can 'deflect' this problem by making 
reference to the Building and Safety people in his locale and 
solve two problems at the same moment?

Best Wishes,

Walt Williams, 99.12.16
PSN #63

==================================
Director
Organization for SETV Research (OSR)
8860 Corbin Blvd, Ste 168
Northridge California, 91367, USA

walt_williams@........
http://www.setv.org
===================================

===================================================


------- Forwarded Message Follows -------
Date:          Wed, 15 Dec 1999 22:33:43 -0500
From:          Peter & Beth 
To:            PSN-L Mailing List 
Subject:       Re: Cheap accelerometer
Reply-to:      PSN-L Mailing List 

I have the same problem with infrasound. For me, its my neighbors
hot tub. When out windows are open, I can't hear it, but during
the winter with the windows closed, it makes the room vibrate,
like the low rumble of a freight train. The tub is located some 50
meters away, on the other side of his house and we still hear it.
I've even considered some kind of active device to introduce out
of phase noise into the room to cancel it. I can sympathize with
your stereo friend... Peter


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Larry Cochrane <cochrane@..............>