Bluetooth Aviaion headsets music can be blocked during intercom communication, the ANR Aviation headset is anti-noise battery box, can not blocked music during intercom communicaiton.  2. Music and voice are output from the speakers at the same time, the low frequency must be weakened when pass the ANR, there is no way to separate. 3. The Bluetooth Aviation headsets music will be noise cancelled when listening to music, but tthe music is interrupted when intercom is used.