Ten years of newer auditorium acoustics measurements

Abstract

This paper reviews progress in making newer types of auditorium acoustics measurements over the past 10 years. All of the newer measures require impulse responses to be obtained and the merits and limitations of various measurement approaches will be discussed including the type of source, receiver, and processing that is used. Objective descriptions and the subjective relevance of the various types of newer measures will be reviewed including both monaural and binaural quantities. Four generations of measurement systems will be described including the special problems associated with measuring inter-aural cross correlation coefficients. Finally the questions of accuracy and repeatability will be mentioned along with some discussion of future developments and problems to be solved.

Analysis of concert hall acoustics via visualizations of time-frequency and spatiotemporal responses

“…This has been presented in several studies, e.g., by Beranek 8 (p. 529), Bradley, 5 Kahle, 9 Hidaka, 10 and Hidaka et al 11…”

“…The parameters are mostly based either on estimating the slope of sound decay or calculating amounts or ratios of integrated sound energy in the impulse response. 5,6 Overviews covering a large portion of room acoustic parameters have been summarized by Lacatis et al, 4 Bradley, 5 and Abdou and Guy. 7 Despite the various approaches to develop objective measures, the use of such parameters contains prominent downsides.…”

Acoustic certification of classrooms

“…Очевидно, состав таких перечней в первую очередь определяется функциональным назначением помещений. Так, например, при паспортизации помещений для прослушивания музыки общее количество оцениваемых характеристик и параметров помещения может достигать двух десятков, хотя на практике этот перечень может быть сокращен до четырех-пяти базовых показателей [9,10,11].…”

Influence of “omnidirectional” loudspeaker directivity on measured room impulse responses

“…While initial research on the reproducibility of room acoustical measurements was driven by the goal to generally assess the validity of measurements (see Pelorson et al 1 or Bradley et al 2 ), the aspect of source directivity was also discussed. The results of these works led to the introduction of source directivity requirements in ISO 3382:1997.…”