Answer:
B) the number of cycles per second perceived by the human ear
Step-by-step explanation:
The best expression that describes pitch is that it is the number of cycles per second perceived by the human ear.
For a wave train, the number of cycles per second is frequency. Whereas the period is the amount of time taken for a longitudinal wave to produce one cycle.
The distance between two corresponding parts of a transverse wave is its wavelength.
- A high pitch will correspond to a high frequency of waves perceived.
- A low pitch corresponds to a low frequency of waves.