Description

The product which has the double ear head circling structure is the audio terminal for the pilot. It is used for the various models of the aircrafts, such as aerotransport and helicopter. The product not only has the voice transmitting and receiving functions but also has the Initiative noise decreasing function so that it can enhance the voice communication articulation in the high noise environment condition(≥**0dB).The pilot’s audition is protected availably. The technical specifications of the product have been satisfied with the earphone and speaker requirements of China Civil Aviation Technology Standard CTSO**7a/*8a. This product has the good characteristics in the anti-noise, circuit stabilization, beautiful appearance, the stable performance and the comfortable adorn. Main Specifications:    Frequency range:**0Hzï&frac*2;ž***0Hz Power supply voltage: (9±3) V DC    Operating current: ≤*0mA    Transmitting average sensitivity: (ï&frac*4;*3±4)dB/Pa    Receiving average sensitivity: (*0±5)dB/mW    Average sound-insulating quantity of the ear-cup:≥*5dB (**0Hzï&frac*2;ž***0Hz)    Active anti-noise sound-insulating quantity:Max≥*2dBï&frac*4;›Min≥6dB (*0Hzï&frac*2;ž**0Hz)    PS:The transmit sensitivity can be adjusted according to the requirement of the user; the earphone can be also used in single track or double tracks;It also has the volume-regulating ***** transmitter-receiver impedance can choice *5Ω, **0Ω, **0Ω, **0Ω, etc.