Generate octave spectrum

returns the octave spectrum of a signal `p`

= poctave(`x`

,`fs`

)`x`

sampled at a rate
`fs`

. The octave spectrum is the average power over
octave bands as defined by the ANSI S1.11 standard [1]. If
`x`

is a matrix, then the function estimates the octave
spectrum independently for each column and returns the result in the
corresponding column of `p`

.

specifies additional options for any of the previous syntaxes using name-value
pair arguments.`p`

= poctave(___,`Name,Value`

)

`poctave(___)`

with no output arguments plots
the octave spectrum in the current figure.

[1] *Specification for
Octave-Band and Fractional-Octave-Band Analog and Digital Filters*. ANSI
Standard S1.11-2004. Melville, NY: Acoustical Society of America, 2004.

[2] Smith, Julius Orion, III. "Example: Synthesis of 1/F Noise (Pink Noise)." In
*Spectral Audio Signal Processing*.
http://ccrma.stanford.edu/~jos/sasp/.