A transducer is an electronic device which transforms energy from one form to another. For instance, position and pressure sensors, antenna microphones, loudspeakers and thermometers. Photocells, LEDs (light-emitting diodes), and even common light bulbs are also transducers, even though this is not a common knowledge. Importance of Transducer: The transducers in a speaker convert electrical signals into acoustic sound. A transducer is used in the antenna to convert electromagnetic waves into an electrical signal. A transducer measures load on the engines Transducers are used in an ultrasound machine They are used to detect the movement of muscles, this process is known as acceleromyograph. Factors to consider while selecting a transducer: Transducers should have high input impedance and low output impedance to avoid the loading effect. A transducer should be highly sensitive to desired signals and insensitive to unwanted signals. Transducers should be able to work in corrosive env...