Are there no ear plugs that meet your noise reduction rating criterion?

Paul

-----Original Message-----
From: Wayne Phan
Sent: Aug 18, 2014 11:31 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] Ear muffs


Hi all,


Some of the students in our biochemistry use a sonicator (Fisher Scientific Model 100 Ultrasonic Dismembrator). This sonicator emits a high-pitched sound. I know that in some labs, people wear ear muffs when using the sonicator. I think it would be the safest thing if our students also had ear muffs to wear when using this instrument. Any recommendation for an appropriate lab-safety type of earmuff?

Thanks,

Wayne