Question

write a short note on any three of the following devices

1) Visual Display Unit
2) Speaker
3) Microphone
4)Scanner ​

Answer 1

Answer:

• Short for video display unit, VDU is a computing device that allows for input by a user and output to a display, like a computer monitor. A VDU consists of a display device and a keyboard, and could also include a mouse. In the United States, it is sometimes referred to as a video display terminal, or VDT.
• A speaker is a term used to describe the user who is giving vocal commands to a software program. 2. A computer speaker is an output hardware device that connects to a computer to generate sound. The signal used to produce the sound that comes from a computer speaker is created by the computer's sound card.
• A microphone is a device that captures audio by converting sound waves into an electrical signal. This signal can be amplified as an analog signal or may be converted to a digital signal, which can be processed by a computer or other digital audio device.

Explanation:

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