V

Vart

Audioholic
MACCA350 said:
What equipment are you using to play the tones?
I am using the onboard sound from my motherboard(Iwill KA266r), in to a Yamaha amp(AV-90PY), and then to a pair of crappy Hollywood Excursion car component speakers that I built some enclosures for. I'm pretty sure I'm not hearing a 25kHz tone, but it doesn't seem to be just distortion either. Oh well, not a big deal.
 
Tomorrow

Tomorrow

Audioholic Ninja
Yeow....I'm hearing nada (10k-20k)...I sure hope it's my cheapo Logitech speakers. Otherwise......oh well, I'm old...very, very old.....:(
 
C

cornelius

Full Audioholic
I can only get to 17k with my laptop. On my editing software (and a different computer), I can generate tone from 20 to 20 and can hear all the way up to 20k.

I heard on NPR that kids are downloading high pitched ring tones that the teachers can't hear...
 
warhummer

warhummer

Junior Audioholic
23k....

I just gave it a try and definitely heard the tone at 23K and thought I heard it at 24K. I doubled check my last audiogram from my last flight physical and it seems to agree. Apparently I seem to be a poster-boy for the Navy's hearing conservation program. Although if it was up to OSHA, no aircraft carrier would even remotely come close to meeting the dB threshold for a "safe" working environment.
 
J

jlindsey86

Audioholic Intern
I can hear up to 22K, does it count if I had to turn the amp way up?
 
K

korgoth

Full Audioholic
lame.. i can only hear up to 14k.. and im 23.
my ears suck
 
WmAx

WmAx

Audioholic Samurai
I have tested my hearing since I was 16, as the years progressed, noticeable HF reduction is noticed. I used a high quality sine wave generator with a transducer of known measured response. I start at 1khz and set the volume at a moderately high, but comfortable SPL. I then vary the frequency, increasing, until I can no longer hear the signal. Not exactly the most accurate method, I admit, but it has served me for rough estimations. When I was 16, I could hear up to about 22 Khz using this method(or a little higher if I turned up the volume, thus cheating). Over a decade later, and I pooped out at about 18kHz(without cheating) when I tried this about the middle of last year.

As others have warned, the equipment must be considered. Some equipment will create lower frequency artifacts than the fundemental test tone due to various distortion(s).

-Chris
 
WmAx

WmAx

Audioholic Samurai
jlindsey86 said:
does it count if I had to turn the amp way up?
No. I can hear that high if I turn it up high enough[to kill bats]. :)

-Chris
 
zildjian

zildjian

Audioholic Chief
The volume is just as important as frequency. How your hearing is assessed at the various frequencies is based on how loud the signal has to be for you to hear it. Normal hearing should fall from 0-20 dB for most frequencies; when it takes 20-40 dB to hear it, it's considered mild hearing loss. Moderate loss is 40-60 dB, severe from 60-80 dB, profound 80 dB and above.

Also, if you're testing yourself @ home with your computer, the most consistent results are obtained by using headphones rather than using your external speakers, and use a hearing test that makes you calibrate the volume to where you can barely hear it using the calibration tone.
 
mtrycrafts

mtrycrafts

Seriously, I have no life.
zildjian said:
The volume is just as important as frequency.
Also, if you're testing yourself @ home with your computer, the most consistent results are obtained by using headphones rather than using your external speakers, and use a hearing test that makes you calibrate the volume to where you can barely hear it using the calibration tone.

The equal loudness curves, Fletcher-Munson or others come to mind:D
The threshold of detect increases in spl on either side of the mid bands:D
J. Stewart or Meridian in one of his papers mentioned 100dB spl at 20kHz? The F-M only goes to 16kHz.
 
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