ultrasonics

ultrasonics

Posted by Bill Way (A) on December 23, 2014 at 11:13:07

In Reply to: RE: Follow these links posted by Jack D II on December 23, 2014 at 10:03:00:

I don't think we have the answers in yet, and I'm open to all options.

First, I think Rupert Neve's talk, posted ages ago in prop head or t-squared, goes into some digital hash they heard on a system and had a hard time sussing out. The culprit was something in the DAC algorithm that caused a spike somewhere above 40kHz. I'm sure neither Rupert nor I can hear 40k, and I believe him when he says that something about that spike made itself heard to his fairly elderly ears. (No measured anomalies showed up below that spike.) Rupert makes the proposition that we *may* have to make our digital systems clean up to the 60kHz region in order to make digital better. He may be right.

Second, I wonder how it is that we adjust so easily to extremely reduced frequency response. My 1931 recording of Faust with Vezzani, Journet, and Merthon has nothing, I'd guess, above 5kHz, and nothing below 300Hz, but after a few minutes my ears and brain adjust, and the music comes through wonderfully.

I find it curious that we might need lots more ultrasonic extension to get it all, *and* we can enjoy music with hugely restricted response at both ends. Contradictions can be good if they keep us thinking.

WW
"Put on your high heeled sneakers. Baby, we''re goin'' out tonight.

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Follow Ups Full Thread

Topic - How high is "treble"? - Jack D II 07:42:20 12/23/14 (28)

RE: How high is "treble"? - Inmate51 09:03:38 12/24/14 (0)

Here - tomservo 06:07:46 12/24/14 (0)

RE: How high is "treble"? - fantja 04:52:40 12/24/14 (0)

Not nearly as high as - kavakidd 23:41:17 12/23/14 (0)

upper audible frequencies - cloudwalker 23:21:40 12/23/14 (0)

The way I see and hear it - Awe-d-o-file 17:31:03 12/23/14 (0)

I would call 7kHz... - mkuller 16:20:31 12/23/14 (0)

Strictly musicologically speaking, "treble" is up from circa 600 to 1300 Hz fundamentals - John Marks 15:41:30 12/23/14 (8)

Do your speakers reproduce past 20K and/or do you employ a super tweeter? nt - Rick W 14:49:38 12/26/14 (0)

And there is a logical leap from being able to detect to being able to make any - tinear 09:37:05 12/24/14 (2)

Magritte... - genungo 09:49:41 12/24/14 (1)

Again, you take the extremist position. The ability to see at the outer periphery of a test is far, FAR beyond - tinear 12:36:40 01/6/15 (0)

Great post. -t - jusbe 06:23:09 12/24/14 (2)

RE: Great post. -t - Jack D II 07:17:27 12/24/14 (1)

No doubt. - jusbe 01:52:01 12/28/14 (0)

Yup, yup and yup. You got it 100%. nt - Nuit 16:57:48 12/23/14 (0)

RE: How high is "treble"? - Jack G 11:00:47 12/23/14 (0)

RE: How high is "treble"? - fantja 10:36:12 12/23/14 (0)

Follow these links - Brian Walsh 08:18:41 12/23/14 (9)

If we don't have a supertweeter, our speakers can't reproduce past 20k........... - Rick W 11:08:36 12/23/14 (2)

Magnepan ribbon tweeter goes up to 40,000hz.. Just sayin' supertweeter?? nt - Nuit 15:07:49 12/24/14 (0)

RE: If we don't have a supertweeter, our speakers can't reproduce past 20k........... - middleground 03:58:43 12/24/14 (0)

RE: Follow these links - b.l.zeebub 11:02:59 12/23/14 (0)

RE: Follow these links - Jack D II 09:02:24 12/23/14 (4)

RE: Follow these links - middleground 09:54:54 12/23/14 (3)

RE: Follow these links - Jack D II 10:03:00 12/23/14 (2)

much less experience here - Ozzie 22:15:24 12/23/14 (0)

ultrasonics - Bill Way 12/23/1411:13:07 12/23/14 (0)

Follow Ups

ultrasonics - Bill Way 12/23/1411:13:07 12/23/14 (0)

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