DADiSP Octave Overview

1/N Octave analysis module

Octave collageDADiSP Octave software module is a menu-driven module designed to simplify the task of octave, 1/3 octave and 1/N octave analysis used to characterise acoustic energy in a wide variety of applications.

DADiSP/Octave provides 1/N octave analysis using true IIR digital filters that conform to ANSI S1.11 and IEC 1260 specifications. A, B and C weighting filters can be applied to the input data. Output results include mean power, max power, min power and un-weighted RMS values. The output can be normalised with a calibration value. The results can be plotted on log or linear axes and exact or preferred frequency values are supported. All options can be specified through a straightforward dialogue box interface.

Key features

  • Simple dialogue box user interface.
  • True IIR digital filter implementation.
  • Conforms to ANSI S1.11 and IEC 1260 specifications.
  • Optional A, B and C frequency weighting filters.
  • Whole octave frequency spacing.
  • Fractional (1/N) octave frequency spacing.
  • Support for preferred or exact frequency values.
  • Binary and Decimal frequency ratio methods.
  • ISO band number centre frequency option.
  • Supports user defined centre frequencies.
  • Mean, Max, Min or RMS Power per band outputs.
  • Multiple Graphic Styles including bar and step plots.

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