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DarwinNE / BK2034_GPIB

Tools for controlling a Bruel & Kjaer 2034 via the GPIB (IEEE488) bus
GNU General Public License v3.0
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Increase the resolution of the 1/3 octave analysis for low frequency. #3

Closed DarwinNE closed 9 years ago

DarwinNE commented 9 years ago

Currently, the 1/3 of octave analysis for very low frequency done by octave.c is affected by a huge error, since only one spectrum is acquired between 0 Hz and 6.3 kHz. It would be better to acquire the spectrum twice, one below 800 Hz to have a good representation for low frequencies, and one up to 25kHz, to have information on all the audio band. The acquisition should be done automatically and data gathered during the two passes should be blended together.

DarwinNE commented 9 years ago

Done! Maybe we should still see wether a correction has to be applied when the number of FFT bins in a computed interval is very small.