Transducer vs. Loudspeaker — What's the Difference?

A transducer is a device that converts energy from one form to another. Usually a transducer converts a signal in one form of energy to a signal in another.Transducers are often employed at the boundaries of automation, measurement, and control systems, where electrical signals are converted to and from other physical quantities (energy, force, torque, light, motion, position, etc.).

A loudspeaker (or speaker driver, or most frequently just speaker) is an electroacoustic transducer, that is, a device that converts an electrical audio signal into a corresponding sound. A speaker system, also often simply referred to as a "speaker" or "loudspeaker", comprises one or more such speaker drivers (above definition), an enclosure, and electrical connections possibly including a crossover network.

(Physics) A substance or device, such as a piezoelectric crystal, microphone, or photoelectric cell, that converts input energy of one form into output energy of another.

A device that converts electric signals to audible sound, especially one that is freestanding or part of an electronic device such as a television.

(Biology) Something, such as a receptor in a cell membrane, that transmits a signal within a cell or from the exterior of a cell to its interior.

An electromechanical transducer that converts an electrical signal into audible sound.

A device that converts energy from one form into another.

Any such transducer that is loud, as opposed to quiet ones such as those found in headphones.

(computing theory) A state machine that generates output based on a given input.

An encasing containing one or more loudspeaker devices and usually other electrical equipment such as a driver.

An electrical device that converts one form of energy into another

A device which converts electrical signals into sounds loud enough to be heard at a distance, usually outdoors; it is used to amplify or transmit over a distance speech from a person, who is typically speaking into a microphone. Sometimes it is used to play recorded speech or music.

Electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance