The Route to Realtime Third Octave Analaysis on a PC
Andy Rumble · Aircraft Engineering and Aerospace Technology · 1993
THE vast majority of noise specifications, rating indices, requlations and working procedures are based around overall levels and/or octave or fractional octave frequency analysis. Traditionally, analyses of this type are carried out by passing noise signals through analogue filter sets, using the ‘energy’ (pressure‐squared) outputs that result to drive analogue or digital indicators.