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Can you hear the 19khz pilot with your own ears?
- Thread starter nd2023
- Start date
Yes.
Well, I used to. When I was younger I had hearing like a dog. I could hear the pilot tone on FM, those ultrasonic bug repellers, and even the CRT drive circuit of televisions and old monochrome computer monitors - to the point that I could tell what kind of picture was on the tube or not, meaning if it was blank, had the antenna or VGA cable unplugged, or whether it was something moving across the screen.
Same thing with my low-frequency hearing. We once had an earthquake where I lived and I heard it coming before anyone else, and before we could even feel it.
But alas - age, raves, dance clubs, and being a roadie for 10 years have taken their toll, even though I wear ear plugs RELIGIOUSLY. I wear them when I just go out to a noisy bar to drink after work, and even when I work in the UPS room here at the studios - the square waves in the power inverters make my ears ring like crazy. I always have a pair of foam ear plugs in my pocket in case I need them. Even now they're in my pocket (probably with llint stuck to them). =-)
Well, I used to. When I was younger I had hearing like a dog. I could hear the pilot tone on FM, those ultrasonic bug repellers, and even the CRT drive circuit of televisions and old monochrome computer monitors - to the point that I could tell what kind of picture was on the tube or not, meaning if it was blank, had the antenna or VGA cable unplugged, or whether it was something moving across the screen.
Same thing with my low-frequency hearing. We once had an earthquake where I lived and I heard it coming before anyone else, and before we could even feel it.
But alas - age, raves, dance clubs, and being a roadie for 10 years have taken their toll, even though I wear ear plugs RELIGIOUSLY. I wear them when I just go out to a noisy bar to drink after work, and even when I work in the UPS room here at the studios - the square waves in the power inverters make my ears ring like crazy. I always have a pair of foam ear plugs in my pocket in case I need them. Even now they're in my pocket (probably with llint stuck to them). =-)
I've worn earplugs religiously since 1980. Steel mills and printing plants don't have any quiet places.
On the other hand, I don't wear them at live shows, so there's been some loss.
Old TV's were 14,758, and yes it was easy to tell what the screen was doing.
I could walk past a house, and tell the TV was on if the windows were open, even if there was no sound.
I BUILT my last two NTSC televisions into the wall, with insane amounts of noise absorpbtion behind plate glass so I could watch TV without getting a headache.
Even after turning an "unsilenced" TV off, my ears would ring with the sweep noise for about 30 minutes.
I am REAL happy the new TVs don't have this issue!
On the other hand, I don't wear them at live shows, so there's been some loss.
Old TV's were 14,758, and yes it was easy to tell what the screen was doing.
I could walk past a house, and tell the TV was on if the windows were open, even if there was no sound.
I BUILT my last two NTSC televisions into the wall, with insane amounts of noise absorpbtion behind plate glass so I could watch TV without getting a headache.
Even after turning an "unsilenced" TV off, my ears would ring with the sweep noise for about 30 minutes.
I am REAL happy the new TVs don't have this issue!
'Fraid not...at age 57, the audio oscillator (assuming I can trust the calibration) says my MUF is 13.5khz.
At 56 I always hear whistles, tones, and what sounds like a motor running. All thanks to too many teen hours with the Koss headphones cranked up and bouts with ear infections as a little kid.
We did this unauthorized "experiment" in a Physics lab. At the time, I could hear up to around 21 kHz if I remember right. Dr. Fred Bueche, who wrote some Physics texts while at the University of Dayton, and was our lab instructor, pointed out that there were all kinds of variables though. Those included the headphone frequency response, the impedance matching, and some others. The audio frequency source we used was the same one we used to do the General Radio Impedance Bridge measurements, and I don't know if it was designed for low impedance headphones.
I hear it with no trouble.. I also hear CRTs like many of you have stated also.
I used to freak my air staff out by calling to tell them to pot down the cassette deck or cart machines when they were not being used.
I too should have much more hearing loss than I do. I consider myself lucky I don't.
I used to freak my air staff out by calling to tell them to pot down the cassette deck or cart machines when they were not being used.
I too should have much more hearing loss than I do. I consider myself lucky I don't.
HAHAHA!!! Awesome. I just LOL'ed... =-)TomT said:
spinjector said:
That was funny!
BTW, we did an experiment several years ago in a soundproof production room where we generated tones in Cool Edit. IIRC, I "heard" to about 16-17khz. Above that, it became more of a "sensation." Very hard to describe. It's like I could "feel" or "sense" the tones with my ears. I could tell something was being played, but I couldn't really hear it. Very strange.
huh?
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