It is called a speaker.
The device that converts sound into an electrical signal is called a microphone. It captures sound waves and converts them into an electrical signal that can be amplified, recorded, or transmitted.
The rate at which an electrical device converts energy from one form to another is called electrical power. The rate at which electrical energy is changed to another energy form electrical power.
A device that converts mechanical energy into electrical energy is called a generator. It uses the principle of electromagnetic induction to produce an electric current when a mechanical force, such as rotation, is applied to it.
Efficiency
A device that supplies electrical energy is called a power source or a generator. It converts other forms of energy, such as mechanical or chemical, into electrical energy.
An incandescent lightbulb is an example of a device that converts electrical energy into light and heat. A loudspeaker is a device that converts electrical energy into sound.
-- microphone -- piezoelectric crystal -- dynamo
It is a thermocouple that converts thermal energy into electrical energy through what is called the thermoelectric effect.
The device is called an electrolyzer. It converts electrical energy into chemical energy by splitting water molecules into hydrogen and oxygen gases through a process called electrolysis.
microphone
That's called an electric motor.
An electrical fan converts Electrical Energy to ME.