Industrial Hearing Conservation programs have become common in America's workplaces, due to stringent, government-imposed noise exposure limits. Both disposable and custom-molded hearing protectors are widely used in industry and construction, as are head-worn earmuff devices.
Microsonic offers custom Sound Defenders, molded from ear impressions made by an industrial hygienist, audiologist or hearing aid dispenser. They are available in Synth-a-Flex (vinyl) or M-2000 (soft silicone), and can be ordered as solid plugs or with Double-Damped vents for differing requirements. Easy-to-insert canal-shell models are also available. The information that follows includes the attenuation data and noise reduction ratings (NRRs) of tested products. Attenuation tests have been performed according to the American National Standards Institute (ANSI) Specifications S3.19-1974.
Notice that fairly predictable control over the level of attenuation of low frequencies can be obtained through the use of various damper values. Dampers used in pairs offers smooth curves and controlled attenuation well into the mid-frequencies.
The popular Musicians Earplugs™ that attenuate sound equally across the sound spectrum are also used by many people in industrial or personal applications. They are described in more detail in the Products for the Musician section.
Full shell sound defenders:
Canal shell sound defenders:
Double-Damped Model "B" Sound Defenders:
Double-Damped Model "B" Sound Defenders contain a matched pair of exclusive Microsonic-designed dampers, and are available in this single value. These HPDs are easy to keep clean and functional and offer good attenuation, as well.
