Paper Details

Present days reproducing of sound with good quality has great demand and increasing day by day .Ideally, thehigh-fidelity equipment,like high end audio systems,power amplifiers,audiophile,home audio system must produceless noise and distortion and a flat frequency response within the human listening frequency range.A lot of research is goingon to develop popular type of system for reproducing music since from 1970’s.the audio equipment must produce the sound ofaudible rang i.e,for healthy young person it ranges from 20Hz to 20,000Hz.the electrical technology is so developed that audioreceivers can produce humans range quite easily.the out put of audio signal produced by high-fidelity systems should be againfeed into the suitable audio drivers which can reproduce the sound,because of this reason the demand of production of qualityloudspeakers has increased and producing human range frequency drivers is not that easy and also expensive.miniature hasgreat demand.At present the parameters that influence the production of low frequency is presented.The thiele parameters thatinfluences for the production of low frequency drivers is discussed ,they are Peak Diaphragm Displacement Volume(Vd),suspension compliance (Cms),Displacement-Limited acoustic power output rating(PAR),the voice coil movement in onedirection without leaving the uniform magnetic field (Xmax),the air compliance inside the box(Vas),excursion limit (Xlim),thespeaker cone surface area that is connected to rubber(SD) and the weight of the cone assembly and the driver radiation massload(Mms).the resonance frequency of any driver generally depends on the reciprocal of stiffness and effective mechanical massof the driver these in turn depends on other parameters.by improving them drivers for producing low frequency can beconstructed.

Shashi kumar Jakkaraju, Dr.Y.Markandeya, Sultan Baba, “Improvement of resonance frequency in Sub woofer Driver”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 14, pp. -, January 2018.