Transducer

[Magaret]

A device that converts variations in a physical quantity, such as pressure or brightness, into an electrical signal, or vice versa.

[Lanell]

2 or more people [taking a Dump] at the same time ([different] [toilets])

[Oralee]

any electronic device that changes one form of energy into another, such as a microphone , which changes sound waves into electrical signals