. Elements of acoustical engineering. Electro-acoustics; Sound. EXPONENTIAL CONNECTORS 95 X O I z < Q uJ 0 Q. 5 -I 1 k A A /N ^ ^ \y '^ ' ' â './ * 200 400 FREQUENCY z < 1 1 r A A /~\ n 'I'V ' 1 \ \ 1 / \ / .y ,^ './ \J .. 200 400 TREQUENCY C 3 u */) 2 X UJ y I a 0 2 '/t\ ' /!\ r A / / 1 \^ / / 1 V r yN '^/ 200 400⢠FREQUENCY. 200 400 FREQUENCY Fig. The throat impedance characteristics of a group of exponential horns, with a flare cutoff of 100 cycles and a mouth diameter of 20 inches, as a function of the throat diameter. S\ is the area of the throat in square centimeters. Note: t
. Elements of acoustical engineering. Electro-acoustics; Sound. EXPONENTIAL CONNECTORS 95 X O I z < Q uJ 0 Q. 5 -I 1 k A A /N ^ ^ \y '^ ' ' â './ * 200 400 FREQUENCY z < 1 1 r A A /~\ n 'I'V ' 1 \ \ 1 / \ / .y ,^ './ \J .. 200 400 TREQUENCY C 3 u */) 2 X UJ y I a 0 2 '/t\ ' /!\ r A / / 1 \^ / / 1 V r yN '^/ 200 400⢠FREQUENCY. 200 400 FREQUENCY Fig. The throat impedance characteristics of a group of exponential horns, with a flare cutoff of 100 cycles and a mouth diameter of 20 inches, as a function of the throat diameter. S\ is the area of the throat in square centimeters. Note: the characteristic shown is the throat acoustic impedance multiplied by ^^i and divided by pc. r, resistive component, x, reactive component. V-^s, ^.4 »| ^in '"' .r\ 2 / *y ^ 2 r 7 3 O -3 X,.'~\ ----i 'A /â » - CM.â^ r r I \ i\ f\l\ < \ 1 l\J' 5 r o / \ \ X ,. , ..^ Fig. The throat acoustic impedance characteristics of two exponential connectors with a flare cutoff of 100 cycles. The mouth of the horn is connected to an infinite pipe. r, resistive component, x, reactive 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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