22 kHz. No one can hear 222kHz! Hearing like that has made for an interesting life. I used to shut off the mower and go in the house to answer the phone in graduate school, drove my housemate nuts (she was partially deaf and the phone had an extra loud ringer, but it was still a mechanical bell). Other than the fact it was actually ringing she would have accused me of making things up.
Ultrasonic alarms are not ultrasonic for me, they used to run around 20kHz. Loud bastards. I hear all sorts of things at work no one else does, too -- I can tell when one of my HPLC pumps isn't working right by the "screeech" it makes, when the pressure is low or oscillating, the sound changes on the fill (fast) stroke. I can also hear some sort of interference pattern in front of one of the computers, get a a "ning ning ning" ringing sound similar to the pumps on the HPLC, but they aren't running. Over driven transistor amps have been known to run me out of the room with my hands over my ears -- clipping causes very loud transient harmonics in that situation, and while it wasn't bothering anyone else, it was so freaking loud it was painful to me. The guys on the dorm floor thought I hated rock and roll, especially Yes. Not my favorite music for sure, but it's unbearable with the ear-spitting high frequency noise. I also, sadly, notice almost every off note in a musical performance. I can't produce music worth a hoot, no sense of pitch to speak of, but I can sure hear a sour note. Takes a lot of the enjoyment out of it. _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
