Final answer:
A transducer is the device that converts signals into audio or visual forms, such as a microphone converting sound into an electrical signal.
Step-by-step explanation:
The device that is responsible for converting signals into audio or visual form is known as a transducer. This function is similar to sensory transduction in the nervous system where specific sensory inputs are converted into electrical signals. An example of a transducer in technology is a microphone, which picks up sound and converts it into an electrical signal that can be displayed on devices like an oscilloscope. Other devices like amplifiers, converters, and modulators have different functions, such as increasing signal strength, changing signal forms, and altering signal characteristics, respectively.