Question

A shrill sound has a _________ pitch and a dull sound has a ___________ pitch.
A. High, Low
B. Low, High
C. Low, Low
D. High, High

Answer 1

Hint: Pitch is basically the frequency of the sound that the human ear understands. A sound having a higher frequency is said to have a high pitch and lower frequency sounds have low pitch. A sound having higher frequencies is said to be shrill and one having a lower frequency is said to be dull.

Complete step-by-step solution:
Sound is a wave and has all the properties of a wave. Sound can also be characterized by the various properties of a wave, like amplitude, frequency, etc. Corresponding to these properties sound has defining characteristics, namely, Pitch, Loudness, and tone.
The amplitude of the soundwaves gives it loudness. A sound wave having a higher amplitude is loud and vice versa. A loud sound has a higher amplitude and more energy.
Pitch is basically the frequency of the sound that the human ear understands. A sound having a higher frequency is said to have a high pitch and lower frequency sounds have low pitch. As the frequency or pitch of the sound increases it gets sharper and shriller like a child crying or a girl screaming these are sounds having a high pitch and are considered to be shrill. Similarly, sounds of a bass drum or rumbling are sounds that have low frequency or pitch and are called dull sounds.
So, a shrill sound has a high pitch and a dull sound has a low pitch.
Thus, Option A is the correct one.

Note: There are limitations to the various aspects of sound waves that the human ear can identify and listen to. The human ear can only identify sounds having pitch or frequency between 20-20,000 Hz. Similarly, there is a limit to amplitude too, the loudness of sound is expressed in dB. Sound louder than 130dB can cause permanent injury to the human ear.