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Acoustics: Sound Fields, Transducers and Vibration, 2nd Edition by Tim Mellow, Leo Beranek

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15.8. Neutralization of stray capacitances

Inevitably, in the real world, we encounter stray capacitances between adjacent rings. This may be in the form of capacitance between the stator rings themselves (anything up to 10% of the capacitance of the air gap), in the wiring and most significantly within the windings of the inductors, which need many turns of wire to produce the high inductance values needed. The capacitances between adjacent rings and within the wiring can be measured directly, but the winding capacitances of the inductors are best found indirectly by measuring their self-resonance frequencies. The effect of the stray capacitance is to bypass the inductors at high frequencies and thus reduce the amount of delay in the delay ...

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