Amplitude,Time period,Frequency — lesson. Science CBSE, Class 8.

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A sound wave can be defined by its

Wave diagram

Amplitude:

The amplitude of a sound wave can be defined as the maximum displacement of the particles from their mean position due to the vibrations.

Time period:

The time taken for one complete oscillation of a sound wave is called the time period of the sound wave.

Time period (T) = \frac{1}{Frequency}

Frequency:

The number of oscillations an object takes per second is called its frequency.

\(Hertz\) (\(Hz\)) is the SI unit of frequency.

Frequency = \frac{Total number of oscillations}{Total time taken}

\(1\) \(Hz\) \(=\) \(1\) oscillation per second

Speed of the sound:

The speed of sound is defined as the distance that sound travels in one second. The letter ‘\(v\)' stands for speed of sound.

It is mathematically represented as,

v = n λ

where '\(n\)' is the frequency and '

λ

' is the wavelength.

Distance travelled by the sound wave is found by,

Distance (d) = Number of waves \times Wavelength (λ)

Reference:

http://mrjkelly.weebly.com/goal-2-sound-and-loudness1.html

https://www.vhv.rs/viewpic/hTwoJTm_time-period-amplitude-and-frequency-of-wavelength-time/

https://uvicaudio.wordpress.com/2014/10/29/frequency-filtering/

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4. Amplitude,Time period,Frequency