State whether true or false:
Shrill sound is a high-pitch sound and a soft sound is a low-pitch sound.
A. True
B. False

Hint: The vocal cords of women are thicker than men , therefore they produce a shrill sound , which we know has higher frequency or higher pitch , whereas men's voice is grave , means low frequency i.e. lower pitch

Complete step by step answer:
The more energy the sound waves or vibrations have, the louder the sound you hear. If you play an instrument harder, it gives a loud sound.
The less energy the sound waves or vibrations have, the softer the sound you hear. If you play an instrument lightly, it gives a soft sound.
When an object vibrates very fast it makes a high pitch sound and when it vibrates slower it makes a low pitch sound.
Pitch/shrillness is determined by the frequency of a wave, and frequency is the combination of wavelength and speed at which the wave is traveling. Sound has a constant speed of 340 meters per second, so wavelength dictates pitch. The shorter a sound's wavelength, the higher the pitch of that sound. Shrill sounds have short wavelengths and grave sounds have longer wavelengths.
Pitch of sound also depends upon the:
(i) Length of vibrating body
(ii) Tightness with which it is stretched
(iii) Thickness of the vibrating body.

The vocal cords of women are thicker than men, therefore they produce a shrill sound , which we know has higher frequency or higher pitch , whereas men's voice is grave , means low frequency i.e. lower pitch
So we can conclude that shrill sound is high-pitch and a soft sound is low-pitch sound.

Hence, option (A) is correct.

Note:Wavelength is inversely proportional to pitch of sound. Hence pitch of sound is maximum if wavelengths are short.