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/sci/ - Science & Math

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6722914 No.6722914[DELETED]  [Reply] [Original]

So /sci/, I am going to be a huge pain in the ass and ask about formulae for sound waves. I am joining a physics group, as two of my friends talked me into it and I am generally alright with physics. My only problem is I don't know anything to do with sound waves as I missed that section in high school. (I know the basics e.g. caused by vibrations, what Hz are) but I don't have any formulae. Could you share some useful ones please? Or any useful facts would be good

>> No.6722996

Well from what I've heard they can be pretty loud.

>> No.6723048
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6723048

>>6722996
Thanks for the help

>> No.6723053
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6723053

>>6722996

>> No.6723107

sin(t)

This is the basic 1 dimensional wave equation describing the evolution a system, which we physicists call a harmonic oscillator, over time.

A traditional longitudinal sound wave in air is a pressure oscillation, so the wave equation above describes the fluctuating pressure at a given point in space over time.

Tell me if you need any further information.

>> No.6723234

Sound waves are the propagation of kinetic energy in a medium. The amplitude of the transverse waves reflects the magnitude of the energy, and the amplitude of the longitudinal waves are caused conservation of energy as the wave passes. It's like a wave on a beach - the size of the waves increases as the energy in the ocean increases, and the rate of the waves is proportional to how much energy is in a single wave.

>> No.6723273

Sure.

<div class="math">\nabla^2p - \frac{1}{c^2}\frac{\partial^2 p}{\partial t^2} = 0</div>
Where c is the speed of sound and generally <span class="math">c = \sqrt{\frac{B}{\rho}}[/spoiler]

>> No.6723286

>>6723107
Sin t doesn't describe the evolution of a wave you mong,

sin t would describe the evolution of a point in the medium that a wave is passing through.