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 ?
The ear defender marketplace alone totals $4 billion per year and two of the most prominent companies in this field are currently evaluating the Ultimistics product.
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.
Back on the streets Mark suggested we remove the ear defenders so I can readjust to normality.
Only this week Gordon Brown said that a multi-million-pound deal would see serving soldiers equipped with lighter helmets, torso-encircling body armour, ear defenders and tougher boots.
So feeling quite at home, with my ex-Birmingham Airport issue ear defenders firmly in place, factor 15 slapped on and obligatory vat of gin to hand, I settle down to watch the action.
For activities such as gardening, remember to use ear defenders when using power tools.
We are loud and wear ear defenders on stage, and sometimes our manager 'Beverley' Bordman, a former Vietnam helicopter pilot, comes on stage wearing a frock.
In the 1970s soldiers were supplied with ear defenders in the shape of ear plugs.
As the music festival season is here, I'd urge music lovers to wear ear defenders and avoid dangerously high volumes on personal music players, which can lead to tinnitus.
While it's difficult to imagine life being both deaf and blind, Andrew brought along ear defenders and special glasses to offer others an idea of the scale of the challenge.
I go to a lot of concerts and I've noticed a lot of people in the industry now wear ear defenders.
Although Mr Liddle was wearing a three-quarter length fluorescent safety jacket and hard hat, he may also have had on ear defenders attached to the hat and it is likely he heard nothing of the advancing machine, said Tim Gittins, prosecuting.