ear defender

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Related to ear defender: Hearing protection

Ear Defender


a means of personal protection from the harmful effects of noise; such devices fall under the classification of protective clothing and equipment. Two types of ear defenders are distinguished: the internal type, which is inserted into the outer ear canal, and the external type, which covers the entire outer ear. Internal ear defenders are plugs made of special fabric, extremely fine glass wool, ordinary cotton wadding and gauze, rubber, or plastic. External ear defenders may be in the form of a helmet liner, used to protect aviators’ hearing, or protective cups, similar in appearance to headphones, consisting of two shells or cups linked to one another. The shells are made of several layers of sound-absorbing materials, such as thick felt, cardboard, rubber, or vinyl chloride, with fillers between them, such as oakum or slag wool.

The use of ear defenders reduces the effective noise level at least 20-30 decibels. The noise spectrum is also less harmful because high-frequency sounds are attenuated.

ear defender

ear defenderclick for a larger image
Any device, such as an earplug or an earmuff, used to protect the human ear from loud noises, like that of jet engines, that may damage hearing. Combined earplugs and earmuffs provide the maximum ear protection. Another combination of helmet and neoprene earplugs is equally effective. The illustration indicates the maximum attenuation level of some of the protection devices.
References in periodicals archive ?
Sarah Broadbent, Technical Services Engineer for the 3M Personal Safety Division, explained: "The protection level and versatility of our new Peltor brand LiteCom Headsets mean these ear defenders are suitable for a number of industries.
Although they weren't ear defenders they still drown out noise.
Northern Safety Supplies Ltd does workwear from hard hats, safety boots, clothing and ear defenders to 'working at height' equipment.
We usually bring ear defenders out for him but I had forgotten all about there being a match on.
Warwick Crown Court heard that the 15-year-old boy was "seconds away" from opening fire - after loading two cartridges into the gun and putting in ear defenders - but instead dialled 999.
You took out a 12-bore, double-barrelled shotgun and 200 cartridges, and taken out ear defenders to protect your ears in the shooting you planned.
JSP says it has developed a new range of Sonis Helmet Mounted Ear Defenders which peak at an unbeaten SNR of 36 and this new range is specially designed to be compatible to work with the company's Evo range of industrial head protection.
The client said: "He provided ear defenders for my father and shared a sense of humour with my mother who found the presence of Russ and his team reassuring while she was alone in the house.
To help the industry combat this, the JSP Research and Development team has designed a new range of Sonis Helmet Mounted Ear Defenders which peak at an unbeaten SNR of 36.
George made a rare public appearance just over a week ago when he donned ear defenders to explore the aircraft at the Royal International Air Tattoo in RAF Fairford - in what was his first official engagement in the UK.
George was in his element at The Royal International Air Tattoo this month - once Kate had muffled the deafening noise with a pair of ear defenders.