. Elements of acoustical engineering. Electro-acoustics; Sound. 216 MICROPHONES The absolute value of the term on the right is given by * I *J -1/2 2-n-j{x—xcose)/\ dx Re = / 7 7 \ Sin - (/ — /cos B) X ^ - (/ - I cos 6) The directional characteristics of the microphone of Fig. for various ratios of length of the line to the wavelength are shown in Fig. LENGTH = ^ LENGTH = —. LENGTH =2X LENGTH - a\. 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
. Elements of acoustical engineering. Electro-acoustics; Sound. 216 MICROPHONES The absolute value of the term on the right is given by * I *J -1/2 2-n-j{x—xcose)/\ dx Re = / 7 7 \ Sin - (/ — /cos B) X ^ - (/ - I cos 6) The directional characteristics of the microphone of Fig. for various ratios of length of the line to the wavelength are shown in Fig. LENGTH = ^ LENGTH = —. LENGTH =2X LENGTH - a\. 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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