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William Daniel, Edward W. Allen, Donald G. Fink 1011304Propagation
<emphasis role="bold">Introduction</emphasis> The portion of the electromagnetic spectrum currently used for radio transmissions lies between approximately 10 kHz and 40 GHz. The influence on radio waves of the medium through which they propagate is frequency-dependent. The lower frequencies are greatly influenced by the characteristics of the eart…
Jerry Whitaker; Blair Benson: Standard Handbook of Audio Engineering, Second Edition. Propagation, Chapter (McGraw-Hill Professional, 2001), AccessEngineering Export