The Fs
resonance does have its width BUT that means that the 30 Hz PR resonance
out of my example is excited when the driver is not exactly at 30 Hz
(not that a 30Hz PR can resonate at 32 0r 28Hz!). By definition a
Helmholtz Resonator has one frequency based on mass and the air spring.
If we want multiple frequencies, we need multiple PRs that each have
their own frequencies (and due to "Q" their own trash when other
frequencies are needed). In addition, the PR needs several cycles to
"get up to speed". It is ALWAYS way behind the active driver. The problem here is the single PR RESONANT FREQUENCY that will modulate everything else.
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