Nth Octave Frequency Bands

This program calculates the 1/N-octave band center frequencies and also the lower and upper bounds of every frequency band from min_f to max_f (Hz).
The frequency arrays are also ouput in a cell of string of characters for plotting purposes.
The program uses ANSI S1.6 for octave and third octave band center frequencies.
The program uses two stages of rounding.
The estimated center frequencies are rounded to 3 significant digits and the last digit is rounded to the nearest multiple of five. If the center frequencies are within 1% of their value when rounded to one significant digit, then the value is rounded to one significant digit.  Requirements:
· MATLAB 7.5 or higher

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