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RE: Are CD jewel boxes resonators? At what frequency(s)?

Sure, they would have at least several resonances depending how it was excited.

For instance, if it were attached to a voice coil or excited mechanically, all of the resonances would show up as peaks in the radiation's frequency response (like cone breakup does).

On the other hand, if exposed to radiated sound, those resonances act like an powered vented box near another speaker or diaphragmatic wall panel, those resonances act as an absorbers and put notches in the response.

Resonance can either add to a signal or subtract from it depending how it was driven.


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