Question

What is the 'frequency' of a vibrating object? How is it related to shrillness of a sound ?​

Answer 1

${\huge {\underline {\purple {\mathbb{ANSWER}}}}}$

Sound is produced by rapid to-and-fro movements, called vibrations or oscillations. The number of oscillations per second is called frequency of oscillating body. The SI unit of frequency is hertz (Hz). The higher the frequency, the more shrill is the sound.