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Old 02-26-2009, 06:33 PM   #11
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Default Re: How many of these can you hear?

I could only hear up to 18.8. Does the quality of your speakers have an effect too?

Horrible sounds to listen to with headphones BTW.
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Old 02-26-2009, 06:34 PM   #12
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Default Re: How many of these can you hear?

I can hear the 19.9KHz tone perfectly.

21.1KHz and 22.4KHz Nothing!

Theres no tone at 22.4KHz. It's a placebo thats caught peolpe out here already lol. There's a 21.1KHz tone but I very much doubt that people will hear it. Your dog will go crazy though.

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I could only hear up to 18.8. Does the quality of your speakers have an effect too?
Not the quality but the frequency range of the speakers. The speakers will reproduce frequencies higher than stated. They just start to roll of at certain octaves. Just turn up the volume.
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Old 02-26-2009, 07:21 PM   #13
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Default Re: How many of these can you hear?

yea, the 21.1 sounds lower than the 19.9.......
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Old 02-26-2009, 07:26 PM   #14
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Default Re: How many of these can you hear?

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Originally Posted by tom-knox View Post
I could hear 'em all pretty much.
What do you mean pretty much?




I can hear all except for the last one
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Old 02-26-2009, 07:33 PM   #15
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Default Re: How many of these can you hear?

14.1 but I'm sick and my ears are plugged, I'll try later when I'm better.
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Old 02-26-2009, 07:35 PM   #16
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Default Re: How many of these can you hear?



Ok I recorded the tones into Cool Edit Pro and the screen shot shows a lot about this test.
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Old 02-26-2009, 07:39 PM   #17
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Default Re: How many of these can you hear?

Haha, my headphones can't even play the 18KHZ ones.

They're naturally getting quieter as a trick?
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Old 02-26-2009, 07:41 PM   #18
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Default Re: How many of these can you hear?

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Haha, my headphones can't even play the 18KHZ ones.

They're naturally getting quieter as a trick?
Yep.

The first 3 peak at about -1dB. The 4 tones after that peak at pretty much 0dB. The 8th tone peaks at -1dB. The 9th tone @ -4.5dB(less than half the power of the previous!). The 10th tone @ about -14.3dB and the 11th tone @ -33.3dB.

The 12 tone, as proved above, just isn't there.

No one will hear the 11th tone @ -33.3dB down! But through a very, very big audio rig!
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Old 02-26-2009, 07:48 PM   #19
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Default Re: How many of these can you hear?

I'm done at 14.1

I have old ears that have been through too many LOUD concerts.
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Old 02-26-2009, 07:50 PM   #20
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Default Re: How many of these can you hear?



There you go. Full spectrum analysis. Last one also shows the (no-existent) waveform.
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