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Crystals - acoustic pressure reduction or RFI/EMI absorption?

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Posted on March 19, 2017 at 17:04:31
geoffkait
Manufacturer

Posts: 9928
Location: northern Virginia
Joined: August 23, 2000
What do you think and how would you go about proving it?

 

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RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on March 21, 2017 at 17:19:17
hawkmoon
Audiophile

Posts: 722
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
Manufacturer

Posts: 9928
Location: northern Virginia
Joined: August 23, 2000
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: 3181
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: 1599
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
Manufacturer

Posts: 9928
Location: northern Virginia
Joined: August 23, 2000
Whoa! What? Hey, let's keep this civil.

 

LOL, posted on September 13, 2018 at 14:22:05
emailtim
Audiophile

Posts: 2042
Joined: July 2, 2017
too funny

 

RE: Crystals - acoustic pressure reduction or RFI/EMI absorption?, posted on February 11, 2019 at 13:14:00
6bq5
Audiophile

Posts: 3181
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: 11985
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
Manufacturer

Posts: 9928
Location: northern Virginia
Joined: August 23, 2000
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
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: 73
Location: New York
Joined: November 2, 2012
Contributor
  Since:
December 0, 0000
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.

 

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