Players play through blowing air through the double reed, making the reeds vibrate.
Its reeds vibrate when the desired keys are activated and the player blows through a tube.
Only the reed with the same resonant frequency as the transmitter would vibrate to any appreciable extent at the receiving end.
If the mouthpiece is not placed far enough into the mouth, no noise will be generated, as the reed will not vibrate.
The battery current was not causing the vibration but was needed only to supply the magnetic field in which the reeds vibrated.
The reed vibrates at a rate determined by the resonator.
They are typically not used in conjunction with a mouthpiece; rather the two reeds vibrate against each other.
When the player blows, the reed vibrates.
When bending, the player forces the lower of the two reeds in a chamber to vibrate faster, while the higher pitched reed vibrates slower.