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  1. R

    Acoustics - Critical Bandwidths ?

    Solved it! It must be a sum, was mistaking my logs for lns :-(
  2. R

    Acoustics - Critical Bandwidths ?

    Hello! I'm getting a bit confused with how to deal with sound waves that are within one critical bandwidth of each other. I do not fully understand how you are meant to combine the intensities of sound waves when they lie within one critical bandwidth?! I would really appreciate some...
  3. R

    Mean Energy Fluctuations

    Great thank you!
  4. R

    Mean Energy Fluctuations

    Hello! I'm getting muddled with the notation in my notes, in which I have \overline{(E-\overline{E})(P-\overline{P})} From which you can get \overline{EP} - \overline{E} \ \overline{P} I can see where these come from, but not where the \overline{E \overline{P}} - \overline{\overline{E}...
  5. R

    Acoustics Wave Equation

    That's super, thank you!
  6. R

    Acoustics Wave Equation

    Great, thanks! With that further approximation that the sound waves are adiabatic, PV^{\gamma} = constant, does that also then put limitations on the pressures that can be described by the acoustic equation?
  7. R

    Acoustics Wave Equation

    So when considering the higher pressure waves, you would derive an acoustics wave equation in which you didn't make small amplitude waves approximations? I get it now! Thank you :-)
  8. R

    Acoustics Wave Equation

    Hello! When considering the acoustics wave equation \frac{\partial^{2}P}{\partial t^{2}} = c^{2} \nabla^{2} P I don't really understand why you can say that the applicability of this equation varies for different sound pressure levels. I don't see why this shouldn't hold for all...
  9. R

    Treating fluids classically

    Sorry, DUH, I just thought E=kT= 0.5mv^2 Silly me
  10. R

    Treating fluids classically

    Hey Just wondering why atoms in liquids can be considered classically If you compare the deBroglie wavelength with the atomic spacing, I understand that the deBroglie wavelength should be much smaller than the spacing. But how could you show that? If \lambda = \frac{h}{mv} How...
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