acoular.spectra.synthetic¶
- acoular.spectra.synthetic(data, freqs, f, num=3)¶
Returns synthesized frequency band values of spectral data.
If used with Beamformer.result() and only one frequency band, the output is identical to the result of the intrinsic Beamformer.synthetic() method. It can, however, also be used with the Beamformer.integrate() output and more frequency bands.
Parameters: data : array of floats
The spectral data (sound pressures in Pa) in an array with one value per frequency line. The number of entries must be identical to the number of grid points.
freq : array of floats
The frequencies that correspon to the input data (as yielded by the PowerSpectra.fftfreq<acoular.spectra.Powerspectra.fftfreq() method).
f : float or list of floats
Band center frequency/frequencies for which to return the results.
num : integer
Controls the width of the frequency bands considered; defaults to 3 (third-octave band).
num frequency band width 0 single frequency line 1 octave band 3 third-octave band n 1/n-octave band Returns: array of floats
Synthesized frequency band values of the beamforming result at each grid point (the sum of all values that are contained in the band). Note that the frequency resolution and therefore the bandwidth represented by a single frequency line depends on the sampling frequency and used FFT block size.