(1) Hi. Yes we have quite a lot of info on this. I put together a series of papers for a special issue of Journal of the Acoustical Society of America on this. There are about a dozen paper listed on https://asa.scitation.org/topic/special-collections/uia2018?SeriesKey=jas … and you should be able to download them. If not...
-
I can definitely hear the sound and it causes me physical distress (though not debilitating, it's not harmless either); I've also heard many stories of people being affected but not realizing that the cause is a sound. I'm worried about it actually causing lasting hearing damage.
"When sound becomes hostile"... 
It's insidious, because the inability to localize the sound, and not being used to sounds that high, make it difficult to immediately recognize it as such. I've been in places where something felt off but only upon getting close enough to the emitter did I realize what it was.
-
-
I'm interested in taking calibrated measurements of this. Do you have any suggestions as to what to use for a calibration standard? I have an omni measurement microphone that should be flat enough, I'm thinking maybe I can calibrate the overall gain against a sound level meter.
-
Calibration is not easy at these frequencies & a calibration traceable to national standards is what you want, but expensive. We at Southampton or Dr Ueda in Japan might do a rough one for you. Don’t trust a standard sound level meter at these frequencies, because....
- Show replies
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.