signal will have lost some of its energy after having passed through the communication channel or medium. The signal can be boosted by passing it through a signal amplifier. When the analog signal converted into digital signal. Output transducer The output transducer simply converts the electric signal (created by the input transducer) back into its original form. Examples of output transducers include but are not limited to the following: Speakers (Audio) Monitors (See Computer Peripherals) Motors (Movement) Lighting (Visual) Other Some common pairs of input and output transducers include: Microphones and speakers (audio signals) Keyboards and computer monitors Cameras and liquid crystal displays (LCDs) Force sensors (buttons) and lights or motors Again, input transducers convert non-electric signals like voice into electric signals that can be transmitted over great distances very quickly. Output transducers convert the electric signal back into sound or picture, etc... There are many different types of transducers and the combinations are limitless. See also Automatic call distributor References Further reading Hansell, Clarence W., , "Communication system by pulses through the Earth". Telecommunications Military communications Technology systems