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Ultrasonic cleaning with kirmuss and loss of high frequency details.

I just purchased the kirmuss US machine and diligently followed their instructions to cycle through minimum 3 cleanings of 5 min each with their surfactant applied each time. Upon testing my favorite vinyl and critically listening through my headphones I am convinced I’ve lost high frequency details. My background is completely silent and ticks and pops have been reduced by 95% or more. So cleaning wise it did the job. Anyone here ever experience loss of high frequency detail after repeated US cleaning? Now I’m worried I permanently damaged my favorite vinyl somehow. Please let me know, thx.
tubelvr1
lewm
13,204 posts
 
Bose, the enemy of SQ and truth in advertising.
terry9
2,353 posts
 
@lewm 

105 dB at US frequencies. It's only a bit noisy at the 80 KHz setting, while irritating at 37. Still, nowhere near 105.
genesis168's avatar
genesis168
409 posts
 
Bose NC headphones cancelled everything out. Nice and quiet cleaning session. 
tomic601's avatar
tomic601
12,983 posts
 
Are we sure the Bose can generate an out of phase US signal at the record cleaning machine frequency?

interesting !

cool thread

no reply on the test record test tells much...

that was IMO the right approach 
lewm
13,204 posts
 
 I just noticed something funny, which maybe others have already noticed, and almost certainly the OP has noticed. When this thread was initiated it was about loss of high frequencies on the LP, in other words damage to the LP from ultrasonic cleaning. And then the topic suddenly changed to damage to one’s hearing from being near to an ultrasonic machine. Those are obviously two entirely different things. Maybe the OP can put us back on track.
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