【电】 多向性微音器

麦克风指向性:麦克风背有有气孔的,就是有指向性或抗噪型的麦克风,完全密封的,就是全指向的麦克风.

omnidirectional

omnidirectional

omnidirectional radiator【通信】

omnidirectional hydrophone

omnidirectional radio range

omnidirectional range station

omnidirectional antenna【电讯】

VOR (VHF omnidirectional range)