Question

A sound of high pitch is said to be shrill and its frequency is
A. Low
B. High
C. 50Hz
D. 0 Hz

Answer 1

Hint: Sound originates from vibration of object or particle insides the object. A motion which repeats after an equal interval of time is called periodic motion. And pitch does possess periodic motion. Pitch is a quality that judges the sound as low or high, based on frequency of sound.

Complete step-by-step answer:
Pitch of note the characteristics that differentiate the notes. Pitch of the note is a frequency of vibrations of the source and is equal to the number of vibrations performed by the source per second. The greater is the frequency. Higher is a pitch and when the speech is higher, the sound is said to be shrill. Notes of lower pitch are flat. Male voice is flat while that of the female is shrill on account of higher Pitch.

Additional information:
The sound can be divided into noise and musical sounds. The musical instruments like fluid, guitar, violin etc. Produce sound, which has a pleasant effect on the listener called musical sound. Sound produced by shouting of person, thunderstorm etc. Has an unpleasant effect on the listener is called noise. Closer analysis shows that musical sounds are due to periodic vibration and noise consisting of a regular disturbance of air.
Answer is (B)

Note: The musical sound may differ from one another in three ways. They may differ in loudness, pitch and quality or timber. A sound due to pure sine vibration is called a note. According to Fourier’s theorem any period vibration can be the sum of sine and cosine vibrations, hence every musical sound can be regarded as a combination of notes.