In a modern telephone handset, the microphone uses a piezo-electric crystal and the earpiece is a miniature loud speaker using a moving coil and a permanent magnet. Explain how the microphone creates a current in a pair of wires and how the current delivered to the handset creates sounds from the earpiece.© BrainMass Inc. brainmass.com October 10, 2019, 1:33 am ad1c9bdddf
A microphone is a transducer that uses sound waves as input and convert them to electrical signals as output. A piezoelectric microphone contains a ceramic or quartz crystal. That crystal is exposed to the sound pressure, and the applied sound pressure to the crystal causes it to vibrate. The crystal ...
This posting contains the solution to the operation of a modern telephone handset problem.