An acoustics measurement program for evaluating auditoriums based on the early/late sound energy ratio

Marshall, L. Gerald

doi:10.1121/1.410097

Cited by 48 publications

(37 citation statements)

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“…The C 80 values were obtained by averaging data for octave bands centered at 500, 1000, and 2000 Hz, as recommended by Marshall (1994). The C 50 values were calculated by multiplying the data for octave bands centered at 500, 1000, 2000, and 4000 Hz by weighting factors of 0.15, 0.25, 0.35, and 0.25, and summing the products (Marshall, 1994). Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…Clarity, a basic criterion for sound quality assessment of concert halls, may be estimated by means of auditory evaluation or with the use of objective measurement methods. Auditory evaluation may be made by expert listeners during a live performance of music in a hall (e.g., Marshall, 1994) or in an experiment carried out with the use of test examples recorded in a hall (e.g., Höhne, Schroth, 1995), or presented in synthesized sound fields (Reichardt et al, 1975). In objective measurements clarity is predicted from the value of clarity index, C 80 (Marshall, 1994), also called early-to-late sound index (Barron, 1993).…”

Section: Introductionmentioning

confidence: 99%

“…Auditory evaluation may be made by expert listeners during a live performance of music in a hall (e.g., Marshall, 1994) or in an experiment carried out with the use of test examples recorded in a hall (e.g., Höhne, Schroth, 1995), or presented in synthesized sound fields (Reichardt et al, 1975). In objective measurements clarity is predicted from the value of clarity index, C 80 (Marshall, 1994), also called early-to-late sound index (Barron, 1993). Clarity index has been defined as the logarithmic ratio of sound energy during the first 80 ms in the impulse response to the energy after 80 ms, expressed in decibels (Reichardt et al, 1975).…”

Section: Introductionmentioning

confidence: 99%

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Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures

Miskiewicz¹,

Rogala²,

Rosciszewska³

et al. 2012

Archives of Acoustics

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The purpose of the study was to compare auditory judgments of sound clarity of music examples recorded in a concert hall with predictions of clarity made from the impulse response signal recorded in the same hall. Auditory judgments were made with the use of two methods: by rating sound clarity on a numerical scale with two endpoints, and by absolute magnitude estimation. Results obtained by both methods were then compared against the values of clarity indices, C80 and C50, determined from the impulse response of the concert hall, measured in places in which the microphone was located during recording of music examples. Results show that auditory judgments of sound clarity and predictions made from the C80 index yield a similar rank order of data, but the relation between the C80 scale and perceived sound clarity is nonlinear. The data also show that the values of C80 and C50 indices are in very close agreement.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures

Miskiewicz¹,

Rogala²,

Rosciszewska³

et al. 2012

Archives of Acoustics

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“…Como el G late varía con la distancia, al tomar S AB en el extremo más bajo del intervalo óptimo buscamos tener garantizado que en toda la sala se satisface la condición [4]. De esta manera el RT que debería tener la sala corresponde a 1,85s Como hemos fijado que G late = 0 en el punto más alejado de la sala, si consideramos el modelo de Barron de la energía tardía (6) [5]:…”

Section: La Sala óPtimaunclassified

Calidad de salas para música clásica

Cerdá¹,

Segura²,

Giménez³

et al. 2013

Inf. constr.

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RESUMENEncontrar un parámetro que permita establecer si una sala es buena para la representación orquestada de música clásica, es uno de los intereses básicos de la acústica de salas. Sin embargo, habitualmente las salas se caracterizan por los valores promedio de algunos parámetros acústicos. A partir de los valores ópti-mos mayoritariamente reconocidos, los especialistas consideran adecuada o no una sala para un cierto uso. En trabajos recientes hemos obtenido un modelo que permite clasificar una sala con respecto a la representación de música clásica, a partir del tiempo de reverberación (T30), el factor de energía lateral (LFC) y el envolvimiento del oyente (LEV). Con este modelo podemos determinar los mapas de calidad para salas. En este trabajo presentamos los mapas de calidad de cinco salas. A partir de los resultados obtenidos podemos inferir las reglas básicas que definen un buen diseño acústico. 343-9 SUMMARY Finding a parameter which allows establishing if a concert room is good for orchestral classical music performances or not is one of the main interests in room

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“…For Speech Clarity (C-50), the average value (C-50av) was calculated according to the proposed octave weightings (Marshall, 1994). While calculating the average values, values at the 1 m point were excluded because this distance is not representative of the situation of the audience.…”

Section: C) Intelligibility Parametersmentioning

confidence: 99%

Analysis of Acoustical Characteristics and Some Recommendations for Different Educational Rooms

Escobar¹,

Morillas²

2011

Archives of Acoustics

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Acoustic parameters were analysed in nine auditoria and multi-purpose conference rooms in the University of Extremadura. Parameters related to the reverberation time, background noise, and intelligibility (both physical measurements of different parameters and STI] and speech tests used to study the subjective response of listeners) were studied. The measurements were compared with some recommendations from the literature and, considering that speech was the main use of the studied rooms, with the intelligibility results. Some different recommendations for reverberation times taken from the literature were analysed. The intelligibility results obtained from the measurements were also compared with the intelligibility results that were determined by the speech tests.

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An acoustics measurement program for evaluating auditoriums based on the early/late sound energy ratio

Cited by 48 publications

References 0 publications

Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures

Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures

Calidad de salas para música clásica

Analysis of Acoustical Characteristics and Some Recommendations for Different Educational Rooms

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An acoustics measurement program for evaluating auditoriums based on the early/late sound energy ratio

Cited by 48 publications

References 0 publications

Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures

Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures

Calidad de salas para m&#250;sica cl&#225;sica

Analysis of Acoustical Characteristics and Some Recommendations for Different Educational Rooms

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Calidad de salas para música clásica