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### Theory:

A sound wave can be defined by its
• Amplitude
• Time period and
• Frequency
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.
$\mathit{Time}\phantom{\rule{0.147em}{0ex}}\mathit{period}\left(T\right)\phantom{\rule{0.147em}{0ex}}=\frac{1}{\mathit{Frequency}}$

Frequency:
The number of oscillations an object takes per second is called its frequency.
$$Hertz$$ ($$Hz$$) is the SI unit of frequency.
$\mathit{Frequency}=\frac{\mathit{Total}\phantom{\rule{0.147em}{0ex}}\mathit{number}\phantom{\rule{0.147em}{0ex}}\mathit{of}\phantom{\rule{0.147em}{0ex}}\mathit{oscillations}}{\mathit{Total}\phantom{\rule{0.147em}{0ex}}\mathit{time}\phantom{\rule{0.147em}{0ex}}\mathit{taken}}$
$$1$$ $$Hz$$ $$=$$ $$1$$ 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,
$v=n\mathrm{\lambda }$
where '$$n$$' is the frequency and '$\mathrm{\lambda }$' is the wavelength.

Distance travelled by the sound wave is found by,
$\mathit{Distance}\left(d\right)\phantom{\rule{0.147em}{0ex}}=\phantom{\rule{0.147em}{0ex}}\mathit{Number}\phantom{\rule{0.147em}{0ex}}\mathit{of}\phantom{\rule{0.147em}{0ex}}\mathit{waves}×\mathit{Wavelength}\left(\mathrm{\lambda }\right)$
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/