<html> <head> <style></style> </head> <body class='hmmessage'> ...and if you should drop and break one you have to call in a HazMat team for cleanup. Contains Chinese mercury. (all are made in China) Conrad Hoffsommer > Date: Tue, 15 Mar 2011 12:00:08 -0500 > From: rnossaman@cox.net > To: pianotech@ptg.org > Subject: Re: [pianotech] Discovery surprise > > On 3/15/2011 10:52 AM, Albert Picknell wrote: > > >Perhaps with the second type the sound > > being emitted is just at the edge of my hearing range, and with the > > third type the sound is well beyond my hearing range. Just guessing. > > I can't hear them past the tinnitus (cicadas), so it hasn't been a > problem for me. It's the folks washing dishes in the next room that hurts. > > > > I suspect that with long-term exposure, all of them do damage of some > > kind. > > I wondered about that. At about 30cm, the level had dropped to 60db, so > it seems unlikely. Two hours in the room with the A440 band at the > Yamaha party, however, doesn't seem to worry any of those in atten-dance > and that feels like damage from way down the hall. > > > > I wonder what dogs hear when they're around these things. > > That occurred to me too. Then I wondered if they'd work as bat > repellent! I won't put any outside, just in case. I like bats. > Ron N </body> </html>