Audio - Sampling

Question 1

sampling

Answer 1

Digital sound is captured and processed as samples. The sample rate and size determines the quality of the digital sound:

Question 2

Sample rate

Answer 2

the amount of samples captured per second. Measured in Hertz, higher sample rates lead to better sound as samples are captured quicker and thus, more data is processed. However, higher sample rates will lead to larger file sizes.

Question 3

Sample size

Answer 3

is the size of the samples and amount of information taken from the sound. Measured by bits, higher sample sizes lead to better sound as more data is captured per sample. However, larger samples sizes will lead to larger file sizes. Common sample sizes include 8bit and 16bit.

Question 4

o Two commonly used sampling rates are;

Answer 4

22. 05kHz (22 050 samples per second)
23. 10kHz (44 100 samples per second)

22.05kHz is appropriate for recorded speech however for higher quality music 44.10 kHz is
used.

8-bit(2 to the power of 8) =sound effects
16-bit (2 to the power of 16) = CD quality