Near-Direct and Far-Reverberant Field Response of Direct Radiator Loudspeakers
Aruna Godase1, Farhat Surve2
1Aruna Godase, Electro-Acoustic Research Laboratory, Department of Physics, Nowrosjee Wadia College, SPPU, Pune, Maharashtra, India.
2Farhat Surve, Electro-Acoustic Research Laboratory, Department of Physics, Nowrosjee Wadia College, SPPU, Pune, Maharashtra, India.
Manuscript received on September 22, 2019. | Revised Manuscript received on October 20, 2019. | Manuscript published on October 30, 2019. | PP: 2821-2826 | Volume-9 Issue-1, October 2019 | Retrieval Number: A9791109119/2019©BEIESP | DOI: 10.35940/ijeat.A9791.109119
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Typical audience seating arrangements in rooms and auditoria warrant reinvestigation of the direct radiator speaker response in the near-direct and far-reverberant fields, as the response data provided by the manufacturer is always ideal and does not account for the effect of those fields. The speaker response characteristics of a variety of direct radiator loudspeakers ranging from the conventional squawker to the full range radiator have been investigated in these fields. The speaker response is investigated in the 50 -10 kHz frequency range, by measuring the A-weighted SPL (sound pressure level) in the near-direct and far-reverberant fields, using an acoustic analyzer. The field-specific characteristic for each of the radiators is determined by fitting the SPL data obtained to an appropriate polynomial. The coefficients obtained thereby, allow an objective field-specific study amongst radiators. When a set of direct radiator loudspeakers is available, it is necessary to configure their application, depending upon the optimum sound quality required for a given enclosure, in near-direct field and far-reverberant field. The outcome of this work assists one to configure the best radiator ensemble for a given enclosure, despite placement constraints.
Keywords: Direct radiator loudspeaker, far-reverberant field, near-direct field, speaker response characteristics.