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Old 26th September 2007, 05:16 PM   #1
jahhn is offline jahhn  United States
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Default Higher than 22k, or ultrasonic?

Are there any monitors available which exceed 22k and even emit within an ultrasonic range?

..or, I assume, there is a thread somewhere discussing this already, or building such monitors?

Thanks!!!

Jahhn
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Old 26th September 2007, 11:15 PM   #2
adason is offline adason  United States
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what, you wanna play music for bats?
i bet you can't hear above 17kHz
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Old 26th September 2007, 11:20 PM   #3
MPM is offline MPM  United States
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http://www.northerntool.com/webapp/w...8174_200328174

Hows this?
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Old 27th September 2007, 12:56 AM   #4
tinitus is offline tinitus  Europe
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A small riddle

"WHAT IS IT YOU CANNOT HEAR WHEN ITS PRESENT, AND HEAR WHEN ITS NOT"

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Old 27th September 2007, 01:17 AM   #5
00600 is offline 00600  United States
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Quote:
Originally posted by tinitus
A small riddle

"WHAT IS IT YOU CANNOT HEAR WHEN ITS PRESENT, AND HEAR WHEN ITS NOT"


Silence?
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Old 27th September 2007, 07:23 AM   #6
OzMikeH is offline OzMikeH  Australia
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There is a study done with balinese music and CAT scans.
it appears that the brain scans for those listening to audio with content above 20kHz are different to those same people listening withg the audio cut off at 20kHz.

the listeners could not consciously tell what version of the music they were listening to but their brains were clearly behaving very differently.

I think it was on a link from Lynn Olson's web page but I may be mistaken.

It does make a difference, but you probably won't notice.
Look at any speaker system with super-tweeters. The fostex FT17H supertweeter goes to about 50kHz and only costs about $40 each.
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Old 27th September 2007, 09:38 AM   #7
Colin is offline Colin  United Kingdom
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The Jordan JXR6 measures to 30kHz and runs from 100Hz, so would function from lower-midrange upwards, with no crossover or phase disturbances in the treble.

I've also read about the effect of ultrasound on listener perceptions. I'm sceptical but would be interested to try it sometime. I presume it's a bone conductance effect.
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Old 27th September 2007, 10:32 AM   #8
Geoff H is offline Geoff H  Australia
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This subject seems to come up every so often. The question remains, how is this high frequency recorded? Microphones? Mixing desks? And if it is, how does it get any futher. The sampling rate used is not high enough, so it's not there in PCM recordings. And vinyl couldn't cut it.
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Old 27th September 2007, 10:38 AM   #9
Colin is offline Colin  United Kingdom
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Yes, interesting point. Apart from those who use the super-audio CD format, ultrasonic tweeters are going to be a waste of money.
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Old 27th September 2007, 10:39 AM   #10
el`Ol is offline el`Ol  Germany
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Expolinear have a supertweeter that does 18-100kHz. Nonsense for humans, but your bats will love it.
http://www.expolinear.de
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