E let fmi 4915 hz and fmi1 7127 hz then fmi1 7127 i

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Unformatted text preview: first sidebands vanish when β corresponds to a zero of J1 (β ). The ratio of two contiguous tone frequencies corresponds to the inverse ratio of the corresponding bessel function zeros, i.e. let fm,i = 491.5 Hz and fm,i+1 = 712.7 Hz. Then fm,i+1 712.7 βi = = 1.45 = . fm,i 491.5 βi+1 The two contiguous zeros with this ratio are βi = 10.1735 and βi+1 = 7.0156. Once the correspondence between tone frequencies and Bessel function zeros has been established, the peak deviation is determined using ∆fmax = βi fm,i or ∆fmax = βi+1 fm,i+1 . In either case, the result is ∆fmax ￿ 5000 Hz. 1-15 Solution 1a -...
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