A loudspeaker
That's called a speaker.
current signal into light energy
Name or device! Microphone is the name of device in which sound is changed into electrical signal
No they convert mechanical energy to sound energy.
microphone
Yes, a phonograph captures sound waves and transforms them into mechanical energy to make recordings. The earliest recording device of this type was invented by Thomas Edison.
Microphone
"speaker"
A radio receiver transforms electrical energy to acoustic energy
It transforms by the air so it get to our ears. I hope this helps!
Phonograph
Water heater converts electrical energy into heat energy Fan converts the same into mechanical Speaker converts electrical energy into sound using a magnetic field. A charger changes electrical energy into chemical energy A bulb filament changes electrical energy into light energy