[pianotech] Discovery surprise

[Conrad Hoffsommer]

...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 at cox.net
> To: pianotech at 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
 		 	   		  
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