Crystals - acoustic pressure reduction or RFI/EMI absorption?

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on March 21, 2017 at 17:19:17
hawkmoon Audiophile Posts: 903 Location: cleveland Joined: July 11, 2003	I would listen. . .

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on March 22, 2017 at 04:37:08
geoffkait	Can't get into any trouble that way.

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on September 25, 2017 at 20:36:34
6bq5 Audiophile Posts: 4385 Location: SF Bay Joined: August 16, 2001	build a second listening room in a faraday cage and see if the effect was the same- Happy Listening

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on December 24, 2017 at 17:48:51
Lee of Omaha Dealer Posts: 1800 Location: Omaha NE Joined: September 8, 2006	Build a Faraday cage with strong bars and a good lock and put Geoff in it?

Whoa!! What??, posted on December 27, 2017 at 07:57:40
geoffkait	Whoa! What? Hey, let's keep this civil.

LOL, posted on September 13, 2018 at 14:22:05
emailtim Audiophile Posts: 5394 Joined: July 2, 2017	too funny . 2022/03/30 Historical Records CENSORED

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on February 11, 2019 at 13:14:00
6bq5 Audiophile Posts: 4385 Location: SF Bay Joined: August 16, 2001	we could run a negative grid bias to lower the noise floor.... Happy Listening

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on December 31, 2019 at 15:58:25
Dawnrazor Audiophile Posts: 12587 Location: N. California Joined: April 9, 2004	Move to the country where there is zero rfi. Then test. Invite bigfoot to see what he can hear. Cut to razor sounding violins

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on January 16, 2020 at 16:04:21
geoffkait	Really? You mean where there's no TV and no radio and no cell phones? Alabama? Utah?

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on January 18, 2020 at 11:55:25

Aristarchus

Whatever planet you live on Geoff. I'm told that the teleportation tweek is ineffective where there is RF interference.

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on June 25, 2020 at 21:53:53

jrlaudio
Industry Professional

Posts: 76
Location: New York
Joined: November 2, 2012

Ok now wait a minute ... if your talking "crystal" in a spiritual sense that's very "west coast" and may only apply there.

However ... (oh dear, I'm going to regret this I know), there is a thing called a crystal-lattice filter which could be applied to create a band-pass filter for audio. Sure ... you could use it to filter EMI/RFI. The problem is they are very difficult to design and manufacture in a way that would be up to so-called "audiophile" quality. Not to mention there are better approaches these days. But this is a very old technique that's been around for decades, used in old radio receivers audio stages. So in that sense ... yeah ... crystals. Heck ... Moog used them in his analog synthesizers, and they still do to this day. Best sounding low-pass filter ever in that world.

Not sure what "acoustic pressure reduction" means. I use my volume knob for that.

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on August 7, 2020 at 03:34:51

geoffkait

Acoustic pressure zones in the room are equalized by a number of tried and true audiophile techniques including but not limited to tiny little bowls, large crystals like Brilliant Pebbles, Tube Traps, Helmholtz resonators and Mpingo discs. Franck Tchang discusses the concept of pressure zone equality on in the Stereo Times and 6 Moons reviews of his Acoustic Resonators. To whit,

"...goal is to disarm LF pressure zones. Their deleterious damping on the natural propagation of treble data, air in audiophile speak, gets lifted. Some acoustic equilibrium is restored. The exact metallurgical composition and density of the metal alloys determines decay times and exact energetic conversion potential. Here's another Franckish aphorism: "If you need to break the air in a balloon, use a needle, not a hammer." Tchang views his resonators as needles that puncture pressure zones with minimal effort and maximum efficiency (whereas conventional absorption devices become hammers that add to the mess we're trying to clean up).

More Franck speak: "Against the force, create another force. Reusing the force for its own benefit is key." Sounds like Aikido where an attack isn't blocked but redirected to where it won't do harm - except to the attacker if you're violent or in real danger. "The resonators transform air (noise) into tension. Without this process, our bodies will absorb the tension. I think you will know what I mean by now." I was very curious about these sonic effects on the nervous system. My wife and I have a dedicated meditation room for our formal practice. We view meditation as a process of conducting and magnifying higher energies which then create a shift of perception in consciousness. Anything that could facilitate faster or more powerful access by minimizing disturbances or blocks would be very welcome. Creating peaceful space using Feng Shui is already part of our vocabulary. These resonators seem like another tool from that same tool box. Ivette's very excited - and mostly not about the audio applications. Granted, this isn't the sort of thing you expect to read about in a magazine called The Perfect Sound or Ultimate Stereo. Which is exactly why our publication's name lacks any tie-in with audio. We do get to talk about other stuff as well."

Isolation Ward

Crystals - acoustic pressure reduction or RFI/EMI absorption?

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