ok, here goes...
quote from the big harvey thread (by harvey):
"The system resonance is chosen for a mid band frequency. By itself, the capsule's response looks something like this:
......./\
....../..\
...../....\
..../......\
.../........\
../..........\
./............\ - just one big resonant peak, with the response falling off rapidly on each side of the peak. Now you can tame that peak by putting in a resonant chamber that's tuned to that peak, which will give you two smaller peaks on either side, like this:" etc etc...
Now, I always thought that resonance amplified the frequencys it was tuned for (like in a guitar), how come it here (in the dynamic microphone) lessens the diaphragms response in the frequency it was tuned? Does it absorb the acoustic energy somehow, so that the diaphragm doesn't recieve as much "acoustic attention" in these frequency areas and thereby smooths out the response or what? I hope you can understand my question, I'm looking forward to being taught about resonance and its ramifications on acoustics, and microphones in particular in the proper way.
Also, how does these resonance chambers actually look in a microphone? how do you calculate their size, materials, shape etc.. pictures anyone? Harvey, I know you could explain this to me in your usual informative and helpful way!
/Jonas
quote from the big harvey thread (by harvey):
"The system resonance is chosen for a mid band frequency. By itself, the capsule's response looks something like this:
......./\
....../..\
...../....\
..../......\
.../........\
../..........\
./............\ - just one big resonant peak, with the response falling off rapidly on each side of the peak. Now you can tame that peak by putting in a resonant chamber that's tuned to that peak, which will give you two smaller peaks on either side, like this:" etc etc...
Now, I always thought that resonance amplified the frequencys it was tuned for (like in a guitar), how come it here (in the dynamic microphone) lessens the diaphragms response in the frequency it was tuned? Does it absorb the acoustic energy somehow, so that the diaphragm doesn't recieve as much "acoustic attention" in these frequency areas and thereby smooths out the response or what? I hope you can understand my question, I'm looking forward to being taught about resonance and its ramifications on acoustics, and microphones in particular in the proper way.
Also, how does these resonance chambers actually look in a microphone? how do you calculate their size, materials, shape etc.. pictures anyone? Harvey, I know you could explain this to me in your usual informative and helpful way!
/Jonas