i really aught to save my posting on hearing protection so that I can copy it in when one of these threads start.
following is a link to the OSHA hearing standard. http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=standards&p_id=9735
For those of you who are interested you should look at the Impact standards. Any exposure above 140 dba will cause i irreparable damage to the ears. Above 150 dba the noise will be transmitted through the bones in the skull.
While working as a Safety Professional we had to use full face"motorcycle helmets" for workers in one application.
1 NRR will reduce the exposure level by 1 decibel measured an the A scale. The A scale simulates human hearing.
The cheap foam plugs, provided they are tested and rated in accordance with the NIOSH standards are the most effective hearing protection on the market. When properly inserted they mold to the ear canal. When you move the ear canal shifts and reduces the effectiveness of all other forms of protection.
Ear muffs do not mold to the face and give a good seal. Any penetrations such as glasses will reduce the effectiveness of the muffs. In some cases the stems of a standard of pair of shooting glasses reduced the actual protective factors by 25%. In other words the muffs may be rated at 25 Nrr but actually are providing only providing 18 dba of protection. This is significant when shooting a pistol which generates 130 db of noise.
Having spent a good deal of my life around things which go boom and generators i suffer from Tenitus and hearing loose. If it were not for hearing protection I would be stone deaf. Each time I shoot I than that retired AF LT Colonel who introduced the Military to those little yellow foam E. A. R. Plugs.
following is a link to the OSHA hearing standard. http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=standards&p_id=9735
For those of you who are interested you should look at the Impact standards. Any exposure above 140 dba will cause i irreparable damage to the ears. Above 150 dba the noise will be transmitted through the bones in the skull.
While working as a Safety Professional we had to use full face"motorcycle helmets" for workers in one application.
1 NRR will reduce the exposure level by 1 decibel measured an the A scale. The A scale simulates human hearing.
The cheap foam plugs, provided they are tested and rated in accordance with the NIOSH standards are the most effective hearing protection on the market. When properly inserted they mold to the ear canal. When you move the ear canal shifts and reduces the effectiveness of all other forms of protection.
Ear muffs do not mold to the face and give a good seal. Any penetrations such as glasses will reduce the effectiveness of the muffs. In some cases the stems of a standard of pair of shooting glasses reduced the actual protective factors by 25%. In other words the muffs may be rated at 25 Nrr but actually are providing only providing 18 dba of protection. This is significant when shooting a pistol which generates 130 db of noise.
Having spent a good deal of my life around things which go boom and generators i suffer from Tenitus and hearing loose. If it were not for hearing protection I would be stone deaf. Each time I shoot I than that retired AF LT Colonel who introduced the Military to those little yellow foam E. A. R. Plugs.