Posted by Wardner on March 02, 2010 at 00:09:49 from (4.154.247.144):
In Reply to: Hearing protection posted by Don S. on March 01, 2010 at 19:46:10:
Even librarians who come home and read more books can have hearing loss.
I am retired as a sandblasting contractor. I used to bid contracts that had surface prep and painting content. In order to work for the Corps of Engineers, sandblasters had to submit to a pre-mobilization physical. The audiologists would tell me I had lost some high frequency in my left ear. They said that was to be expected and was probably caused by high-speed driving with the window down. It is a common condition.
I have always used the yellow foam earplugs. All the other plugs are worthless for high noise levels. But I see alot of people who don't take the time to insert them properly. They have to be compressed tightly and pushed in so that they almost contact the ear drum. Anything less achieves very little attenuation.
My hearing is good despite 35 years of three day sandblasting work-weeks. I ran the entire capacity of a 6-71 Detroit Diesel powered air compressor through one nozzle. That would be 750 CFM through a 5/8" to 3/4" venturi nozzle at 100 to 125 psi. That was way over OSHA specs. The noise was so loud that it was off the scale of several decible meters when tested by industrial hygenists.
This post was edited by Wardner at 00:25:44 03/02/10.
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