How we hear the Changes of frequency of sound?

We can hear the changes of frequency of sound by Pitch of the sound.

Explanation:

Sound waves have different parameters like Pitch, Loudness, Intensity etc. Any kind of waves consists of parameters like wavelength and frequency. So pitch is directly related to frequency. If the change in frequency is more, the pitch will be termed as high and if the change in frequency is low, the pitch will be low. So the terminology pitch is used for hearing the sound waves. While frequency is the parameter of the propagation or travelling of sound wave, pitch is the nature of change in frequency heard by the observer.

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation: