Transcription of Lumped Parameter Analysis of a Dynamic Loudspeaker
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Lumped Parameter Analysis of a Dynamic Loudspeaker
Lump edParameterAnalysisofaDynamicLoudsp eakerPaavoJumppanenApril8,2013 Thelowfrequencyb ehaviourofdynamicloudsp eakerdriversiswellundersto o ,particularlyventedloudsp Loudsp eakersinVentedBoxes pap ceedingsandhavetoadmitthatI ndithardtofollow,principallyb ecauseitisbuiltaroundthecontructionofequ ivalentcircuitstorepresentdriverb delling(itisn'tcoveredinthepap er)makesitdi culttounderstandwheretherevariousimp erent,andIb elieve,morereadilyundersto o delsofdynamicloudsp eakersgenerallyassumethatthedriverop eratesinwhatisreferredtoasthepistonop ehavesasarigidb o o diesanditisessentiallyimp os-sibletomakeap erfectpistonbutforlowfrequenciestherigid b o ointatwhichconebreakupb ecomesadominantfactorindriverresp onsegenerallyo ,forthee ectoftheb oxontheresp onseitisassumedthatthewavelengthofsoundi slargecomparedwiththephysicaldimensionso ftheenclosure,whichisgenerallytrueforthe rangeoffrequenciesforwhichtheb oxin uencesthedriverresp (themassofairincontactwiththecone)andthe radiationresistance(energytransmit-tedto airassoundwaves)islump edinwiththemo etweensp eedofpropagationofsoundinairVair,wavelen gth andwavefrequencyf,namelyVair=f 1 DKMFxFigure1.
Lumped Parameter Analysis of a Dynamic Loudspeaker Paavo Jumppanen April 8, 2013 The low frequency behaviour of dynamic loudspeaker drivers is well understood.
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