| 摘要 |
<p>A safe earplug for radiation protection, comprises earplug heads (1A, 1B), sound cavities (2A, 2B), sound wave transmission channels (3A, 3B), a main body (4), a conductor (8) and a plug 9, wherein the channels (3A, 3B) are set between the sound cavities (2A, 2B) and loudspeakers (5A, 5B). the sound collecting cavities (10A, 10B) are between the loudspeakers (5A, 5B) and the sound wave transmission channels (3A, 3B), assembly of the loudspeakers (5A, 5B), the sound collecting cavities 10A, 10B and the sound wave transmission channels (3A, 3B) are sealed to form a sealed small boxes (11A, 11B) in the main body (4). the shape of sound collecting cavities (10A, 10B) is of taper shape. The sound wave is transmitted to the two sound wave channels (3A, 3B) via the sound collecting cavities (10A, 10B) and then is provided to the ears plugged with two earplugs for listening. The safe earplug is used for high frequency magnetic field and intense radiation communication device such as a mobile phone.</p> |
