Higher than 22k, or ultrasonic?

jahhn · 26th September 2007, 05:16 PM

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"

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"

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

26th September 2007, 05:16 PM	#1
jahhn diyAudio Member Join Date: Sep 2007	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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26th September 2007, 11:15 PM	#2
adason diyAudio Member Join Date: Nov 2004 Location: troll in US	what, you wanna play music for bats? i bet you can't hear above 17kHz

26th September 2007, 11:20 PM	#3
MPM diyAudio Member Join Date: Sep 2004 Location: Alabama	http://www.northerntool.com/webapp/w...8174_200328174 Hows this?

27th September 2007, 12:56 AM	#4
tinitus diyAudio Moderator Join Date: Nov 2005	A small riddle "WHAT IS IT YOU CANNOT HEAR WHEN ITS PRESENT, AND HEAR WHEN ITS NOT"

27th September 2007, 07:23 AM	#6
OzMikeH diyAudio Member Join Date: Mar 2007	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.

27th September 2007, 09:38 AM	#7
Colin diyAudio Member Join Date: Aug 2003	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.

27th September 2007, 10:32 AM	#8
Geoff H diyAudio Member Join Date: Oct 2006	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.

27th September 2007, 10:38 AM	#9
Colin diyAudio Member Join Date: Aug 2003	Yes, interesting point. Apart from those who use the super-audio CD format, ultrasonic tweeters are going to be a waste of money.

27th September 2007, 10:39 AM	#10
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	Expolinear have a supertweeter that does 18-100kHz. Nonsense for humans, but your bats will love it. http://www.expolinear.de