Actuator: Speaker

Sounds and music are outputs of speakers.  Speakers are actuators because they convert electrical energy into mechanical motion). In a speaker, alternating current (AC), moving back and forth in a coil of wire causes a sauce cup where the coil is attached to also move back and forth (or vibrate). This vibrating paper compresses air into a sound wave that our ears can hear. In our speaker, where are the magnet and cone?

How do speakers work
Sound Properties: Amplitude, period, frequency, wavelength