Question

The difference between musical sound and noise is due to:
A. Musical instruments
B. Wavelengths
C. Pitch
D. Intensity

Answer 1

Hint: In order to deal with this question first we will define the term pitch and then further we will discuss its property and factors upon which it depends also we will see the difference between music and noise.

Complete step-by-step answer:

Musical sounds are those sounds which are produced due to rhythmic vibration of musical instruments and also by singers. These sounds are pleasant to hear for a person.
Noise is called unwelcome sound irritating, distracting or harmful to ears. From the point of view of physics, noise is inseparable from sound.
Pitch is that characteristic of a musical sound which distinguishes a shrill sound from a grave sound, even though the two sounds may be of the same strength. It is also known as that sound characteristic by which the ear assigns a musical position to it.
Hence, pitch creates the difference between musical sound and noise
So, the correct answer is option C.

Additional information-
Pitch is a subjective property of sounds that enables their ordering on a frequency-related scale, or more generally, pitch is the characteristic that causes sounds to be measured as "higher" and "lower" in the context associated with musical melodies. Pitch can only be determined in sounds that have a frequency that is consistent and stable enough to differentiate between sound and noise. Pitch is a significant musical tone auditive feature, along with length, loudness, and timbre.

Note- When a stretched string is plucked, it produces a sound with a certain pitch sensation. The pitch (the shrillness) gets greater as the stress in the string decreases. Growing the voltage also raises the vibration level. Thus pitch is closely related to frequency. Frequency does not decide the pitch by itself. The pitch is slightly higher than the frequency under 1000 Hz and the position is reversed above 1000 Hz.