Subjective and objective evaluations of a scattered sound field in a scale model opera house

Abstract

Scattered sound fields in an opera house were objectively and subjectively evaluated through acoustical measurements in a 1:10 scale model and through auditory preference tests. Acoustical characteristics were measured in the stalls area with and without diffusers, both on the sidewalls close to the proscenium and in the soffit of the side balcony. Installed diffusers reduced the initial time delay gap and amplitude of the first reflected sound, and decreased sound pressure level (SPL), reverberation time (RT), and early decay time (EDT) at most seats due to the increased scattering and absorption. After diffuser installation, C(80) and 1-IACC(E3) increased at the front seats and decreased at the rear seats. Subjective evaluations showed that the preference of scattered sound fields correlates highly with loudness and reverberance. It was also found that EDT and SPL are dominant parameters describing subjective preference for scattered sounds in this experimental condition.

Effects of the Distance from a Diffusive Surface on the Objective and Perceptual Evaluation of the Sound Field in a Small Simulated Variable-Acoustics Hall

“…One possible explanation of the obtained result is that listeners contemporarily rely on different factors to make their decision. Although a multiple regression could be implemented to investigate the relationship between objective parameters and subjective responses [65], there is a need for a single measurable parameter of more practical use.…”

Using room acoustical parameters for evaluating the quality of urban squares for open-air rock concerts

“…However, in later research, Soulodre found the separation time to be frequency dependent and proposed a set of perceptually motivated integration limits, based on the temporal integration properties of the hearing system [21]. In a 2008 paper by Ryu, the correlation between C x is investigated for 10 ms ≤ x ≤ 200 ms [22]. It is found that C 80 is significantly correlated with C x for 60 ms ≤ x, and 80 ms is chosen as separation limit.…”

Effect of Diffuser Locations on the Room Acoustical Parameters in 1:25 Scale Model Hall

“…그 중 확산체 설계는 내부 장식이라는 시각 적 목적뿐만 아니라, 실내 음장의 고른 분포와 음향 장애요소를 제거하는 역할을 하기 때문에 홀 음질 향상에 주요한 기여 인자로 알려져 있다 [2,3] . 확산현 상에 대한 현재까지의 연구는 확산 알고리즘의 개 발, 확산률의 정의 및 확산체의 설계 등 확산체 시료 를 중심으로 진행되어 왔다 [1,4] .…”