GK
TECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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48.4 kHz
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22,050 Hz
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44.1 kHz
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48 kHz
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Detailed explanation-1: -Analog audio is often recorded by sampling it 44, 100 times per second, and then these samples are used to reconstruct the audio signal when playing it back. The 44.1 kHz audio sampling rate is widely used due to the compact disc (CD) format, dating back to its use by Sony from 1979.
Detailed explanation-2: -For example, a CD uses a 16-bit signal that’s sampled at 44.1 thousand times per second (kHz). The bitrate for such a file would be 1, 411kbps if it wasn’t compressed in any way. However, some MP3 and other compressed digital files are able to get away with much smaller bitrates by compressing the audio.
Detailed explanation-3: -44, 100 Hz (44.1 kHz) is the sampling rate of audio CDs giving a 20 kHz maximum frequency. 20 kHz is the highest frequency generally audible by humans, so making 44, 100 Hz the logical choice for most audio material.