Hello Linda, i read about this .. they are using the high frequency 18,000 to 20,000 hz tone as a ringtone for their cell phones in classrooms! the teacher can't hear it, but EVERYONE else in the cla
Isn't this noise just the irritating one used to drive kids away from their usual 'hanging out spots' that was recently publicised in the UK? Guy R Day AH Sprite Mk IV ps I can hear it.
Why in the world do they need that? I hear that high tone ringing in my ears all day! Still trying to figure how to answer it. Guess I better talk with my grand kids. Hey! Wait a minute, phones ringi
Glad you asked. There is an actual practical application for it. It is used to annoy the people who CAN hear it when they do not represent the desired demographic. Playing classical music can have a
Thanks for the frequency Bill. I'm in my late 40's and couldn't hear a thing. How old are you and did you listen to loud music growing up? I hope one of our sophomores will do their science research
mm.. I can hear it as well. Note: This has played on CNN live and I could not hear it and played on NBC and I could. Be aware that your television (computer) may not play it correctly or that the fil
I think we're missing a variable here. I played it on my computer at work (cheap speakers that came with a Compaq office PC) and heard nothing. Played it on my computer at home (expen$ive KLH studio
Author: "Larry B. Macy, Ph.D." <macy@bbl.med.upenn.edu>
Date: Wed, 14 Jun 2006 20:29:05 -0400
OK, think about that for a minute. A cell phone ring speaker is more like KLH reference speakers or cheap computer speakers or . . .??? You decide. BTW, I can hear it on my cheap computer (Altec Lans
-- "Larry B. Macy, Ph.D." <macy@bbl.med.upenn.edu> I just tried it on my laptop while watching the Yankee game with my son. I thought it was barely audible, my son yelled "DAD!!! Shut it off! I can't
I did not tell you all that we heard it on my IMac G5 at normal volume and at high volume. Kristi and Lambert '74 MG Midget "Mini Lee" (hers) '77 MG Midget (his)
At first I heard nothing then after I figured out that my computer sound was turned down I heard it clearly. My husband, sitting in the kitchen about 15 feet away from the computer, whipped his head
Author: "Robert A. Valentine" <robert@valentinephoto.net>
Date: Thu, 15 Jun 2006 00:01:49 -0400
OK, I had my left eardrum removed a few years ago. Since then scar tissue has COMPLETELY sealed my ear canal. I have maybe 1% hearing in the left ear. Just enough to realize that the nerve is still w
Author: "Larry B. Macy, Ph.D." <macy@bbl.med.upenn.edu>
Date: Thu, 15 Jun 2006 00:13:30 -0400
Tole ya I did not want to hear the answer ;-) -- Larry B. Macy, Ph.D. macy@bbl.med.upenn.edu System Administrator/Manager Neuropsychiatry Section Department of Psychiatry University of Pennsylvania 3
Now THAT's interesting! I wonder if there's some high frequency resonance going on, or your brain has become hypersensitive to that set of nerves because there generally isn't any signal from that s
I (47) and the S.O. (51) hear it loud and clear. The dog didn't like it and the cats ignored it. I have proven high-end hearing loss, and tinnitus, so I'm surprised I heard it. The ear doctor asked m