An air ionizer
microphone
microphone
-- microphone -- piezoelectric crystal -- dynamo
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.
A fan
a peltier
Hooter is an alternate name for buzzer or alarm device.
A microphone is a device that converts sound energy into electrical energy.
The process is called "sound-to-electricity conversion" or "acoustic-to-electric conversion." Sound waves are captured by a transducer, such as a microphone or piezoelectric sensor, which converts the mechanical energy of the sound waves into electrical signals.
A transformer is a device that changes the voltage of an electrical current, either increasing or decreasing it depending on the design.
The device for receiving electric plugs is called a socket or electrical outlet. It provides a connection point for electrical devices to access the electrical supply from the wiring in a building. Sockets can come in various types and designs depending on the region and the specific electrical standards.
Recepticals, light switches, light fixtures etc.... Electrical devices is a generic term for any device that utilizes electricity.