Speakers for High Frequency Sound

You won't need your hearing to do this test all you need to do is turn on the tv and have the proper measurement equipment and a pair of eyes to see the results on your equipment. So there's no hurry.

I have never met a functioning CRT that I could not easily hear.

eardrum

said

in

nurse

used for

drill

No

little

There is a limit to what anyone could reject. As I say, the sound is similar to the sound of a dentist drill or a jet engine, not just in pitch, but in volume. This is not a subtle effect.

stimuli.

If I watch TV, I often tune out the sound of the TV. Then, again, the sound is louder when there no picture displayed. In fact, I can hear shifts in pitch and volume as a television changes the image it displays, or if it has trouble locking onto an image.

Pal M is 15.750 KHZ

Have a look at

for the other international versions of television for horizontal frequency.

Rgds: Eric

Yes and no. If the intensity is high enough, it may be possible to discern pure tones above 20 KHz. OTOH, hearing the removal of sounds is a different question, and the borderline frequency for most people is around 16 KHz.

There are a probably an infinite number of ways that any assumption could be wrong, but that sheds little light on whether the assumption is correct or not.

Sure there is. The perception of pitch is based on the activation of hairs in a coil-shaped structure in the ear. The finest hairs relate to high frequencies, but they don't go on forever. Basically, you run out of structure at some point in this part of the ear, and the extent and health of this structure sets the highest frequencies that you can perceive. It's not uncommon for this structure to be damaged by listening to excessively loud sounds.

Shut up and play guitar. :)

I can easily hear it and my hearing does not go near 16K

Most people can hear it, at least until they are 25 or so but most people do not know how to focus their listening and blank it out kind of like what my son does when I ask him if he did his homework

There is nothing special about hearing this my hearing is down 30 dB at 8 K(as high as the test at AES went) when compared to 3K and I can easily hear it george

the sound is caused by the magnetostriction of the power transfomer

Do you know what are those frequencies for PAL-M?

Sometimes I notice this high-pitched sound coming from my TV... (the 2 TV's I have at home: a 14" Toshiba and a 20" LG, so it's not a fault on the TV)

I have no idea they gave us headphones and had us press a button when we heard sound this was end oct 04 but I also feel(subjectivly ) that I can hear things the tests say I should not be able to Because I can focus my listening and isolate sounds , like a single flute out of a flute section from 150 feet away from the orchestra george

It could easily be measured with Macfoh

Women, and especially black women, are able to hear at higher frequencies than men.

When they're badly designed / manufactured - yes.

Until recent times mostly around 15 kHz.

Nope.

No human can hear those frequencies - well proven - forget it.

Well - I had a proper hearing test when I was in my mid 20s and the nurse commented that I had the most perfect hearing she'd ever measured.

I was on the 0dB line all the way to 8 kHz - the highest frequency used for medical testing it seems.

You have good hearing acuity.

May not necessarily be a result of perfect hearing but a desire to use your ears as a useful tool.

You mean you have diffiiculty with large background levels of noise ? Can't 'reject' it ?

Me too. You have high hearing acuity. Your ears are 'wide open' to stimuli. May ppl simply 'filter out' what they're uninterested in.

Graham

Using a test generator I was able to *sense* rather than hear 22kHz when I was in my early 20s.

Now I'm 50 - I seem to top out on 'hearing' at about 16kHz. That makes me quite lucky it seems.

I do believe you can 'educate' your hearing btw. Be interested to hear - lol - other ppl's comments.

Graham

Interesting.

Maybe you're hearing some magnetorestriction related noise in the LOPT ?

Maybe you underestimate your hearing ?

Graham

George !

Are you thinking of taking up a new role as a comedian ?

I loved that response. :-)

Graham

I suspect that the brain compensates actually.

I reckon also that the simple desire to use your ears effectively influences your result significantly.

E.g. George Martin was a famed record producer but was essentially deaf in one ear !

Graham

Agreed.

It's a matter of intensity.

Normal.

I think that magnetostriction and related vibration in either the transformers or the deflection yoke is the usual explanation.

The mistake appears to be thinking that the limit of HF hearing is one number that does not vary with the details and nature of the test.