. Elements of acoustical engineering. Electro-acoustics; Sound. FINITE EXPONENTIAL HORN 91 h = distance from the apex to the throat, in centimeters, p = density of air, in grams per cubic centimeter, and Za2 = acoustic impedance of the mouth, in acoustic ohms. The impedance of the mouth of the horn is usually assumed to be the same as that of a piston in an infinite baffle. In this case the mouth im- pedance Za2 is given by equation The impedance characteristics of a finite conical horn is shown in Fig. â 25CM.â») u - 2 < CI 2 y4 1;; < 0 c ON CAL r^ /â - - -
. Elements of acoustical engineering. Electro-acoustics; Sound. FINITE EXPONENTIAL HORN 91 h = distance from the apex to the throat, in centimeters, p = density of air, in grams per cubic centimeter, and Za2 = acoustic impedance of the mouth, in acoustic ohms. The impedance of the mouth of the horn is usually assumed to be the same as that of a piston in an infinite baffle. In this case the mouth im- pedance Za2 is given by equation The impedance characteristics of a finite conical horn is shown in Fig. â 25CM.â») u - 2 < CI 2 y4 1;; < 0 c ON CAL r^ /â - - - -â r r .r^ ' ^. .,â / 1 Xa / â¢- V . ... 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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