Identify the term used for the number of bits used to record each sample of a sound.
Mark scheme
- B Bit depth (1)
- The only correct answer is B. The correct answer is bit depth.
- A is not correct because amplitude is the height of the sound wave at the point it is sampled
- C is not correct because the sample interval is the time between each sample
- D is not correct because the sample rate is the number of samples taken each second
Example answers and how they were marked
Full marks1/1
B Bit depth
Why: Selects the only correct option (1).
No marks0/1
D Sample rate
Why: Near miss: this is the number of samples taken each second, not the number of bits per sample (0).
No marks0/1
A Amplitude
Why: Typical confusion: amplitude is what is measured at a sample, not the number of bits used to store it (0).