• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Beware the cheap ultrasonic cleaner!

kirk57 said:
FWIW-


Speaking of which.... there is another US thread over at AA in which Harry Weisfeld (VPI) mentioned he noticed a reduction of high frequencies after US cleaning. Not sure how that was explained (and HW is still championing them) but has anybody else noticed this?
Click to expand...

Nope. I read that, too. He claims that in a musical passage, the triangle sound originally sounded like it was 3' away and after a cleaning it sounded 10' away (or something to that nature).

I hope he's not making things up in order to keep sales of vacuum cleaning machines up. There are enough gullible people out there who fall for the fictitious animated graphics pedaling infomercial products.
 
I doubt it. He stated he has a machine in the works that incorporates US and vacuuming both.

And that isn't really HW's MO, anyway...
 
GPJeff said:
Nope. I read that, too. He claims that in a musical passage, the triangle sound originally sounded like it was 3' away and after a cleaning it sounded 10' away (or something to that nature).

I hope he's not making things up in order to keep sales of vacuum cleaning machines up. There are enough gullible people out there who fall for the fictitious animated graphics pedaling infomercial products.
Click to expand...

One must wear ear-protection when working with these units, or leave the room, which is what I do. The noise these u.s. machines make is very high-pitched and loud, and will eventually cause high frequencies hearing loss, imho. As we get older, we all lose the h.f. hearing. Why precipitate it, when it can be avoided?!
 
So you're suggesting the machine itself is affecting the user's hearing, rather than it's use affecting the spectral balance of the U.S.-cleaned LP?
 
Dmitry said:
One must wear ear-protection when working with these units, or leave the room, which is what I do.
Click to expand...

I do wear ear protection. I found that regular ear plugs like the ones we have at work are somewhat ineffective for the higher pitched US machines. I use noise cancelling headphones (the ones that fit over the ears) when I use the US machine.
 
You must log in or register to reply here.
Back
Top Bottom