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The Sound of Noise


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What Noise LOOKS Like

 

Has anyone seen this before? I found the concept very interesting…

 

 

Best,

John

 

P.S. I see I poorly titled this thread: should be "What Noise LOOKS Like"…I wish I could edit that part of the post! Oh well, please take a look at this short video from NPR.

Positive emotions enhance our musical experiences.

 

Synology DS213+ NAS -> Auralic Vega w/Linear Power Supply -> Auralic Vega DAC (Symposium Jr rollerball isolation) -> XLR -> Auralic Taurus Pre -> XLR -> Pass Labs XA-30.5 power amplifier (on 4" maple and 4 Stillpoints) -> Hawthorne Audio Reference K2 Speakers in MTM configuration (Symposium Jr HD rollerball isolation) and Hawthorne Audio Bass Augmentation Baffles (Symposium Jr rollerball isolation) -> Bi-amped w/ two Rythmic OB plate amps) -> Extensive Room Treatments (x2 SRL Acoustics Prime 37 diffusion plus key absorption and extensive bass trapping) and Pi Audio Uberbuss' for the front end and amplification

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What Noise LOOKS Like

 

Has anyone seen this before? I found the concept very interesting…

 

 

Best,

John

 

P.S. I see I poorly titled this thread: should be "What Noise LOOKS Like"…I wish I could edit that part of the post! Oh well, please take a look at this short video from NPR.

 

Has anyone tried using this to be able to actually see a speakers radiation patterns at different frequencies?

Foobar/Squeezebox Duet ->USB,SPDIF/RCA ->Benchmark DAC1 HDR ->Orion ASP ->ATI 6012 ->Linkwitzlab Orion

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Ah! The good 'ol Schlieren system! Been around for hundreds of years. I saw a 16mm educational film (that should date it) about the Schlieren concept back in high school. Edmund Scientific used to sell a system with two concave mirrors back in the day. The setup is a bit touchy, and the video didn't show how adding color filters in the barrier area increases the contrast, image sensitivity, and makes some really far-out psychedelic images. I'll bet it has been used to look at speaker sound patterns, but it works best when the air bends light a lot. To do that you need either a temperature gradient or a significant pressure gradient, like from a loud clap, or a firecracker. Speakers would have to play loud for it to work well, and the setup would have to be really precise.

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