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Q.

The loudness and pitch of a sound note depend on:


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a

Intensity and velocity

b

Frequency and velocity

c

Intensity and frequency

d

Frequency and number of harmonics 

answer is B.

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Detailed Solution

Concept: The amplitude of a sound determines its loudness, but the pitch of a sound determines its shrillness. These two quantities differ from one another based on the criteria that characterize them.
The numerous sounds that we hear with our ears might have distinct properties such as volume, pitch, and so on.
The amplitude or intensity of a sound is defined as its loudness. The greater the amplitude of a sound wave, the greater its intensity and the louder the sound generated. Decibels are the units used to measure the loudness of a sound (dB). Sounds with very high amplitudes can cause harm to our hearing, but sounds with very low amplitudes are difficult to hear.
A sound's pitch is defined as how shrill it is. It is distinguished by the frequency of a sound. We can only hear noises with frequencies ranging from 20Hz to 20kHz. Our ears are not sensitive to frequencies that are higher or lower than the defined range. The greater the frequency of a sound, the shriller the sound and the higher the pitch. Female voices, for example, have a higher pitch than male voices. Singing birds emit high-frequency, high-pitched sounds.
Hence, the correct option is 2.
 
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