Recent content by ngn

Here is one source: https://pressbooks.online.ucf.edu/osuniversityphysics/chapter/16-4-energy-and-power-of-a-wave/ There is a description of how the power of a mechanic wave is proportional to the amplitude and angular frequency. What amplitude measure is being considered here? I can...

Hello, It has been difficult to find a clear answer to this question. I've found some sources stating that the power of a sound wave depends upon both amplitude and frequency. I've found other sources stating that the power of a sound only depends on amplitude. I've found sources stating...

Thank you for the replies. They were very helpful. I think there are different conventions for calculating phase lead/lag. Thus, one can either interpret the displacement/velocity shift as either velocity lagging by 270 degrees or leading by 90 degrees. It would depend on the context, how...

This is a good method when you know the relationships among the phenomena you are studying, but what if you are just given two waves and don't know anything about them or what they plot? Given just two waves, and one is the reference, then which is the best method to calculate the phase shift...

Hi, thank you for the response! So, acceleration is LAGGING, and the text is correct? I am a bit confused then as to what is meant by leading and lagging. I was wondering if you could explain why it is lagging given that by the time the waves reach that point in time, acceleration is further...

I also found this online: One other important thing to note here is that the velocity is also related to frequency (which is discussed below). If we maintain the same peak pressure, the higher the frequency, the faster the particles have to move back and forth, therefore the higher the peak...

Although pressure and velocity are different things, I was working under the assumption that pressure = velocity/impedance (p = v x z), where z = specific acoustic impedance, and thus this equation may be different under conditions of flux. As such, pressure and velocity would be equivalent...

Hello, Came across this picture and passage from a textbook. Although the text lays out a method for calculating the phase shift between displacement and acceleration, I am not sure how they are calculating which wave is leading and which is lagging. From their description, it seems like a...

This is very helpful. I see in the denominator for the displacement amplitude "ω" for frequency. This would mean that as frequency increases, displacement decreases. Okay, that confirms my mental model of the situation. But then I have a few questions to confirm: 1. Even though particle...

Thank you for the reply! Is there a way to explain this in terms of sound? If I play from a loudspeaker two sine waves that are 100 Hz and 50 Hz, and they both have the same amplitude (in the computer which I am using to play the sounds), am I correct in assuming they will be equally intense...

Hello, I have a problem wrapping my head around the relationship between frequency, power/pressure, and displacement. Let's say I have two sine waves that I generated in my computer: A 50 Hz tone and a 100 Hz tone. Let's say they both have an amplitude of 1. Therefore, they will both have...

Hello, I've been trying to wrap my head around why, if given the sound pressure levels (dB1 and dB2) of two uncorrelated sounds, if you want to sum them together, you sum their intensities using the equation: 10 x log10(10^dB1/10 + 10^dB2/10). Likewise, if you want to average them, you average...

Sorry about the TLTR. "Anything else, stay consistent" exactly applies to my question. What about a quantity that isn't clear? In my silly example above, I used an organisms height as an example. Of course, you wouldn't use decibels for that but if you wanted to, is it possible? Is height a...

Hello, I am working with calculating decibels, and there is one equation when using quantities of power and another equation when using root-power quantities (which essentially just converts them to a power ratio and places them into the first equation). I know that common quantities of power...

These responses are very helpful. What I am getting (correct me if I'm wrong) is that the interference pattern will continue to persist in the wave that continues out from behind the slits (until it reaches infinity at which point the pattern will not exist). So for practical, everyday...