Donc confirmation de ce que je disais sur le damping factor
In audio system terminology, the damping factor is the ratio
of the nominal impedance of the loudspeaker to the source
impedance and describes the ability of the amplifier to control
undesirable movement of the speaker cone near the resonant
frequency of the speaker system
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Because of this such drivers have
a relatively poor mechanical damping and therefore electrical
damping is important.
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To define the damping factor only the resistive parts of source,
cable and coil are considered. This simplification is taken because
the worst situation is around the resonance of the speaker, where
the impedance is pure resistive.
