# Search results

1. ### Acoustics - Critical Bandwidths ?

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

Great thank you!
4. ### 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. ### Acoustics Wave Equation

That's super, thank you!
6. ### 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. ### 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. ### 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. ### Treating fluids classically

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