A loudspeaker
That's called a speaker.
current signal into light energy
A microphone is a device that converts sound energy into electrical energy. Sound waves cause a diaphragm in the microphone to move, which then generates an electrical signal that represents the sound.
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.
A speaker is the device that converts electrical energy into sound energy. An electrical signal is sent to the speaker, which causes a diaphragm to vibrate and produce sound waves that we hear as sound.
microphone
No, a violin does not transform electrical energy into sound energy. Instead, sound is produced on a violin by the vibrations of the strings when they are bowed or plucked. The sound waves are then amplified and projected by the body of the violin.
A microphone is a device that converts sound energy into electrical energy.
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.
A radio receiver transforms electrical energy to acoustic energy
A speaker is a device that transforms electrical signals into sound waves. The electrical current passing through the speaker's voice coil interacts with a magnetic field, causing the coil to move back and forth. This movement creates vibrations in the speaker cone, which in turn produces sound waves that travel through the air.
1) Sound already has energy, so if you have a sound, you don't need to convert anything. 2) If you strike an object, you'll make a sound - thus converting kinetic energy into sound energy.