To store sound in binary, an analogue sound wave is sampled at regular intervals.
Define the term 'sample rate'.
Mark scheme
Award one mark for:
- The number of samples taken per second (1)
Allow captured/recorded for taken.
Allow 'samples per second'.
Allow 'each second' for 'per second'.
Allow Hz/hertz as the unit.
Do not accept the time between samples/sample interval.
Do not accept 'the number of samples' without a per second/time reference.
Do not accept the number of bits used per sample/bit depth.
Example answers and how they were marked
Full marks1/1
The number of samples taken per second.
Why: States samples per second (1); 'per second' is accepted.
No marks0/1
The time between each sample.
Why: Defines sample interval, not sample rate; do not accept.
No marks0/1
The number of bits used for each sample.
Why: Describes bit depth, not sample rate; do not accept.