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 & BethTo: 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 _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>