Shrillness of sound is determined by
- Avelocity of sound
- Bamplitude of sound
- Cwavelength of sound
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (c) wavelength of sound
Explanation
Shrillness (pitch) of a sound is set by its frequency: the higher the frequency, the shriller the sound.
In a given medium the speed is fixed and velocity = wavelength × frequency, so a shorter wavelength means a higher frequency and a shriller sound.
Amplitude decides loudness and velocity depends on the medium, so of the options given, (c) wavelength is correct.