. Elements of acoustical engineering. Electro-acoustics; Sound. l^ffwHhE]" EQUIVALENT CIRCUIT 3 L H ^0 / f'-\^ >^ r -^ y \'N I 1 I 1 'A. 1 » FRONT VIEW SECTION A-A 1000 FREQUENCY Fig. Cross-sectional view of a compound horn loud speaker, the developed equivalent of the high and low frequency horns, and the equivalent circuit of the acoustical system. The sections A-A and B-B refer to the horizontal and vertical cross sections of the front view. The graph shows the frequency ranges of the high frequency and low frequency horns and the overall pressure response characteristic. coup
. Elements of acoustical engineering. Electro-acoustics; Sound. l^ffwHhE]" EQUIVALENT CIRCUIT 3 L H ^0 / f'-\^ >^ r -^ y \'N I 1 I 1 'A. 1 » FRONT VIEW SECTION A-A 1000 FREQUENCY Fig. Cross-sectional view of a compound horn loud speaker, the developed equivalent of the high and low frequency horns, and the equivalent circuit of the acoustical system. The sections A-A and B-B refer to the horizontal and vertical cross sections of the front view. The graph shows the frequency ranges of the high frequency and low frequency horns and the overall pressure response characteristic. coupled to a straight axis horn and the other side coupled to a long folded horn. Fig. The equivalent of the system is shown in Fig. The functional equivalent circuit of the vibrating system is shown in Fig. At the low frequencies the reactance of the acoustic capacitance Ca2 is large compared to the throat acoustic impedance of the low frequency horn and sound radiation issues from the low frequency horn. At the high fre- quencies the reactance of the acoustic capacitance Ca2 is small compared Olson and Massa, Jour. Acous. Soc. Amer., Vol. 8, No. 1, p. 48, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Olson, Harry Ferdinand, 1901-. New York, D. Van Nostrand company, inc.
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