Sound

Sound

Photo by Brett Jordan on Unsplash

Introduction : We are well aware of  sound from our TV system, many audio system, This sound is a form of energy which travels in the form of wave. The wave is a system in which there is a transfer of energy and momentum without the transfer of particle. This wave is of different type depending upon dependence of propagation. Light is a type of wave, Sound is a type of wave. Before studying sound wave let us understand different type of wave.

Wave : Wave is described as a disturbance which involve transfer of energy without the transfer of matter.

Different types of waves: 

1) Mechanical wave : A wave that require a material medium for its propagation is called as mechanical wave. eg: sound wave, water wave, etc.

Mechanical wave

2) Electromagnetic wave : A wave that do not require material medium for it's propagation is called as electromagnetic wave. These waves are the result of vibration of electric and magnetic field. eg:  light, x-ray, etc.

Em wave

3) Matter wave : An object in motion is associated with an wave. Such wave is called as matter wave. This wave is related to quantum mechanics.

Progressive wave : Travelling or progressive waves are waves in which a disturbance created at one place travels to distant points and keeps travelling unless stopped by some external force.

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_{Parameter of  a wave}

_{1) Amplitude (A): Maximum displacement of  a particle from its mean position is called as Amplitude.}

_{2) Frequency (}ղ) number of wave formed in one second is called as frequency . ղ= 1/T

_{3) Wavelength (λ) : The distance between two successive particles which are in same state of oscillation}

_{4) Time period (T) : The time taken by a particle to form one wave is called as time period. T = 1/}ղ

5) Velocity (v): Distance covered by a wave per unit time is called as velocity.

V = ղλ

                                          _{│<<<Types of mechanical wave│}

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