TITLE

Acoustical Quality in Concert Halls as Related to Hall Shape: Shoebox, Surround, and Other

AUTHOR(S)
Takayuki Hidaka; Noriko Nishihara
PUB. DATE
September 2015
SOURCE
Psychomusicology: Music, Mind & Brain;Sep2015, Vol. 25 Issue 3, p240
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This article compares acoustical quality in shoebox, nonshoebox, and surround types of concert halls based on objectively measured differences in the actual sound fields. Many concertgoers report that the average subjective sound quality in these 3 types of halls differs appreciably and that there are substantial differences from 1 seating location to another, especially in nonshoebox and surround halls. Measurement data in 5 major concert halls showed that the average sound strength versus distance from the stage attenuated about twice as much in surround halls as in shoebox halls. Special attention is given to the temporal and amplitude structure in the early part (before 200 ms) of the impulse responses measured at various seat positions in 24 well-known concert halls (12 shoebox, 7 nonshoebox, and 5 surround). In particular, reflective energy cumulative curves (RECC) are plotted. Significant frequency components are found in the 125- and 250-Hz octave band and initial 160-ms period after the direct sound arrival. This RECC curve effectively indicates the acoustical-quality spread in a hall. The RECC value at initial 160 ms and Binaural Quality Index (BQI) appear to be the most likely objective parameters to separate 3 types of halls. Based on further analysis of the 63 Hz-band energy build up curves in 11 concert halls, influences of both stage enclosure on bass sound response in the main floor and frequency imbalance in balcony seats are discussed.
ACCESSION #
111895678

 

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