Skip to main content

About this free course

Download this course

Share this free course

IT: Information
IT: Information

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

4.2.2 Microphone input subsystem

We'll now move on to consider the microphone input subsystem.

Activity 10

Is the output from the microphone an analogue or a digital signal?

Discussion

The output from a microphone is an analogue electrical signal. Just as sound in the air involves continuous pressure variations over a continuous range, so the voltage from the microphone varies continuously over a continuous range.

Because I am considering here a digital camcorder, the analogue audio signal will be converted to a digital signal, and this is the main function of the microphone input subsystem. The digital audio signal might also be compressed, and put into a standard format.