FIELD: personal use articles.
SUBSTANCE: device for hearing protection has two closed headphones (2) located on each user's ear and tight to his head with the formation of closed space in each headphone (2) and around the user's ear. Inside the headphone a speaker (4) is located, containing sound-reproducing membrane (5), one side of which faces the user's ear, and the opposite side is turned to a closed space bounded by the membrane and the housing. To improve the frequency band pass in the main range while listening to music the interior of the housing by at least one hole or channel communicates with the environment outside the closed space of the headphone (2). In one preferred version of the invention the housing includes a capsule which is an integrated part of the speaker (4).
EFFECT: enhanced bandwidth in the range of 20-300 Hz.
25 cl, 2 dwg
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Authors
Dates
2012-09-27—Published
2009-04-27—Filed