By Yoichi Ando
Continuing from easy thought to layout experiences of live performance and a number of function halls, the writer introduces a outstanding seat choice procedure for the research of latest and present halls, and proposes a diagnostic procedure for checking out the actual houses and calculating the mental attributes at any seat after a corridor is equipped. The publication additionally offers a thought of subjective personal tastes, in line with a version of the auditory cognitive process within the mind. Readers can hence persist with the temporal and spatial values which may be linked to the left and correct cerebral hemispheres in hearing tune and speech, respectively, in a room. From the result of calculating subjective choice at each one seat, for instance, architects, musicians, and acoustical engineers serious about the layout and use of live performance and multi-use halls may perhaps confirm the simplest position to accomplish a definite form of tune at the level, in addition to the simplest seats from which to hear.
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Additional info for Architectural Acoustics: Blending Sound Sources, Sound Fields, and Listeners (AIP Series in Modern Acoustics and Signal Processing)
1. 1. Preferred Delay Time of a Single Reflection The sound field consists of the direct sound ~o = 0°(170 = 0°) and a single reflection from a fixed direction ~1 = 36°(171 = 9°). These angles were selected since they are typical in a concert hall. The delay time ~tl was adjusted in the range of6 ms to 256 ms. 1). 1 (Ando, 1977; see also Kang and Ando, 1985). Obviously, the most preferred delay time, with the maximum score, differs greatly between the two motifs. When the amplitude of reflection A I = I, the most preferred delays are around 130 ms and 35 ms for motifs A and B, respectively.
10. Plan (a) and cross-sections (b) and (c) of the Uhara Hall, Kobe. Four source positions on the stage, which were switched in the paired-comparison tests of preference without moving subjects from seat to seat. Listening positions were 21 locations and included neighboring seats. 10(a). 44 4. Subjective Preference as an Overall Impression of the Sound Field function must be maintained at an interaural time delay T = 0 to ensure frontal localization of the sound source. However, the IACC was not always maintained at T = 0 due to the loudspeaker locations, because the subjects could not always be facing the source location.
These were measured by the single-pulse method at the far-field condition (Mehrgardt and Mellert, 1977). The angle I:, = 0° corresponds to the frontal direction and I:, = 90° corresponds to the lateral direction toward the side of the ear being examined. r(w) ~ E(w). Therefore, interaction between the sound field in the external canal and that of the outside, including the pinna, is insignificant. The transfer function from the free 48 Y. Ando, Architectural Acoustics © Springer-Verlag New York, Inc.