The Loudspeaker as a Measurement Sweep Generator

Abstract

To measure an AIRF of a music performance hall in an objective and accurate manner, using the ESS process [2, 8], the measurement engineer needs to determine the requirements of the stimulus being generated by the measurement loudspeaker on stage. As an example, an AIRF derivation may be part of a comprehensive document where various acoustical parameters have been measured [17] according to the methodology presented in the ISO 3382-1 standard [18] on the acoustical measurement of performance spaces. However, upon further analysis, some of the required measurement parameters that are part of this methodology have specific limitations, which affect the transparency and accuracy of an acoustical impulse response measurement. Therefore, as an alternative, an AIRF derivation may also be part of an experiment that addresses some of the technical and musical limitations imposed by the requirements of the ISO standard.