| 摘要 |
PURPOSE:To obtain waterproof effect without deterioration in acoustic effect by packing a waterproof material which has gas permeability and sound absobency in the space formed of a housing and the rear surface of a driver, and arranging the waterproof material so that it covers the internal surface of a grill. CONSTITUTION:A waterproof screen 14 blocks the opening part 5 of the housing 4, and a waterproof resistor 15 is inserted into the space formed of a collector housing 3, the housing 4, and the driver 7. The waterproof sound absorbing material 16 is provided in the driver 7, and nonwoven fabric 18 is inserted between the waterproof screen 17 and a protector 10. Then, the headphones are used without any deterioration in sound quality by being applied to ear nasal concha lobes. Further, the resistor 15, sound absorber 16, screen 17, and nonwoven fabric 18 are provided, so the headphones are protected against water sufficiently even when dropped in water and exposed to rain. |
