Question
Download Solution PDFWhich phenomenon is used in audio recording via analog recording and digital recording?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Analog recording: The air pressure changes by the source of the sound. This change at the sound source creates airwaves, which cause a microphone's diaphragm to vibrate. The vibrations convert to an electric current by inducing an electromagnet to imprint a magnetic field on the tape.
- Digital recording: The first stage of creating a digital recording is the same as analog recording. The vibrations convert to an electric current by inducing an electromagnet to imprint a magnetic field on the tape.
But from that point on, things change. The current changes into strings of zeroes and ones. This is a binary representation of on and off. This is done by an analog to digital converter.
EXPLANATION:
- In analog recording, the sound is recorded by air pressure difference.
- In digital recording, the sound is recorded by the current difference.
So option 2 is correct.
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