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-   -   Higher than 22k, or ultrasonic? (http://www.diyaudio.com/forums/multi-way/109093-higher-than-22k-ultrasonic.html)

jahhn 26th September 2007 05:16 PM

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

adason 26th September 2007 11:15 PM

what, you wanna play music for bats?
i bet you can't hear above 17kHz

MPM 26th September 2007 11:20 PM

http://www.northerntool.com/webapp/w...8174_200328174

Hows this?

tinitus 27th September 2007 12:56 AM

A small riddle

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

:clown:

00600 27th September 2007 01:17 AM

Quote:

Originally posted by tinitus
A small riddle

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

:clown:


Silence?

OzMikeH 27th September 2007 07:23 AM

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.

Colin 27th September 2007 09:38 AM

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.

Geoff H 27th September 2007 10:32 AM

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.

Colin 27th September 2007 10:38 AM

Yes, interesting point. Apart from those who use the super-audio CD format, ultrasonic tweeters are going to be a waste of money.

el`Ol 27th September 2007 10:39 AM

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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