Difference between revisions of "Sound"
(Created page with "==Representing Sound== To store sound a digitizer is needed to convert the analogue sound into digital sound. An analogue to digital converter carries out these conversions. ...") |
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====Nyquist's Theorem==== | ====Nyquist's Theorem==== | ||
| − | In order to sample any sound you must use a sampling rate at double the frequency of the original sound. The result will be the closest possible to the original sound. | + | In 1928 Harry Nyquist found that in order to sample any sound you must use a sampling rate at double the frequency of the original sound. The result will be the closest possible to the original sound. |
Revision as of 12:36, 15 December 2016
Representing Sound
To store sound a digitizer is needed to convert the analogue sound into digital sound. An analogue to digital converter carries out these conversions. 16 bit ADC is enough for CD quality sound.
Sampling Rate
The sampling rate or frequency is the number of samples taken per second. It is measured in hertz (Hz. The higher the sampling rate the more accurate the representation of the sound.
Sampling Resolution
The sampling rate is the number of bits assigned to each sample. The more bits assigned the more accurate the representation of the sound.
Nyquist's Theorem
In 1928 Harry Nyquist found that in order to sample any sound you must use a sampling rate at double the frequency of the original sound. The result will be the closest possible to the original sound.
