Loudspeakers & Headphones Flashcards

All 3 cards in this deck

True or false? A loudspeaker works by electromagnetic induction.

False. It works by the force on a current-carrying coil in a magnetic field; a microphone is the one that uses induction.

What determines the frequency of the sound produced by a loudspeaker or headphone?

The frequency of the alternating current supplied to its coil.

What is the useful energy transfer in a moving-coil microphone?

Energy carried by the sound wave is transferred to electrical energy in the circuit (sound to electrical).