SAFE EARPHONE DEVICE Russian patent published in 2013 - IPC H04R1/10 

FIELD: radio engineering, communication.

SUBSTANCE: safe insert earphone device has earplug (1A, 1B) heads, sound cavities (2A, 2B), channels (3A, 3B) for transmitting a sound wave, a main housing (4), a cable (8) and a plug (9), wherein channels (3A, 3B) lie between the sound cavities (2A, 2 B) and speakers (5A, 5B), and sound-collecting cavities (10A, 10B) lie between the speakers (5A, 5B) and the channels (3A, 3B) for transmitting a sound wave; points of connection of the speakers (5A, 5B), the sound-collecting cavities (10A, 10B) and the channels (3A, 3B) for transmitting a sound wave are packed to form small sealed resonators (11A, 11B) in the main housing (4). The sound-collecting cavities (10A, 10B) form a cone. A sound wave is transmitted by two channels (3A, 3B) through the sound-collecting cavities (10A, 10B) and then to the ears in which two earplugs are inserted for listening.

EFFECT: eliminating the effect of a high-frequency magnetic field and intense radio-frequency radiation from communication devices, eg a mobile telephone, on the head of the person, improved frequency characteristics and improved stereo sound reproduction.

22 cl, 32 dwg