Recent content by H_man

Thanks Bobbywhy and Pythagorean.. I am still digesting those papers. I see the matter is not trivial

Hi all The reflection and transmission of a pressure wave at a boundary depends on the relative impedance of the two media. I'm pretty new to acoustics but the textbook I've been looking at doesn't seem to specify that the such calculations are only valid when the medium is at least a few...

Hi Vela, I'm looking for exact solutions, I've already produced pretty graphical plots to get the general idea. Hi AdrianZ, before your post I'd never heard of the Lagrange inversion theorem. I will try this method and let you know if it succeeds. Thank you both for your suggestions.

It's to match the boundary conditions of a corrugated waveguide. I guess I'll just have to do it the messy way :-( Thanks tiny-tim

I am trying to solve x=ytan(y) x is an independent function of which I know the value. I wish to solve for y. I can do this numerically. But I was really hoping someone out there had seen an analytical technique. Anyone?

Thanks uart, this is now clear to me :-)

Hi all, I've noted for years that oscilloscope probes tend to pick up noise from AC power cables, but just recently I tried connecting an antenna (piece of wire) to the probe and placing it near some power cables and voltage recorded was off the scale. I have calculated that the power...

:bugeye:Hi All... I am really confused about the mechanism of loss of energy when an EM wave hits a metal surface. I always thought the reflection was due to the motion of the electrons in the metal (due to the electric field of the wave). Which suggests that resistive losses would come...

Hint.... When the boy is close to the tree the boys walking with the rope in his hands hardly lifts the basket at all. However, when he is far away every step he takes the basket moves almost an equivalent step/amount. As you posted this in Advanced Physics you may want to consider which...

Thanks again! (and yes... I'll get myself a copy of the book :smile: )

For part (a) you just need to resolve the forces parallel to the ramp. Draw a diagram of the ramp, the block, and the rope pulling the block. Try answering this... When the angle of the rope is 26 degrees to the plane of the ramp what component (or amount) of the force is going to the task of...

If my resonator is shorted at one end and has a partially transmitting grid at the other end is it correct to use S and T parameters to build a model of the device? I ask this as the first few sentences of the Wikipedia article on S-parameters states that a matched load should be placed at...

Hi f95Toli... thanks, that's very helpful.

If we have a resonator composed of 2 partially transmitting mirrors/grids and we excite the resonator from one end, say the left side then on the right we expect to get the characterstic transmission comb and on the left the inverse (1-Transmission) reflection curve. Whats giving me a...

Thanks... It makes more sense if this equation can only be used under certain circumstances (far field). Although it still seems/feels like there is some constant missing from the equation.