Analysis of sound field isotropy based on directional energy decay curves

Berzborn, Marco; Vorlaender, Michael

doi:10.1121/1.5068254

Cited by 2 publications

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“…However, only comparative result were presented in his research. Directional energy decay curve was presented in (Berzborn, et al, 2019). The author present a model that sound decay analysis measurement contain clear inconsistencies.…”

Section: Review Of the Related Literaturementioning

confidence: 99%

Comparison of Blind Reverberation Time Estimation in an Enclosed Space by Analysing Energy Decay Curve

Muhammad¹,

Abdullahi²,

Aliyu³

2023

FJS

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This paper presents a novel method for estimating reverberation time in an enclosed space by analyzing the energy decay curve. Reverberation time (RT) is a key parameter to determine the acoustic of a room and it provides an information about the quality and intelligibility of sound in an enclosure. RT can be determine directly from room acoustics, but in case where this is difficult to determine, it is estimated blindly from the reverberation speech. Blind reverberation time (BRT) is a method of measuring the reverberation time of a room without the use of any external equipment. It is based on the human auditory system's ability to detect and measure the decay of sound and acoustic properties of a room, which can be used to determine how suitable it is for certain activities, such as music or speech. In this study, we provide a study/comparison of two methods for BRT estimation. Data were collected from relevant papers as cited. Comparison of the two methods are carried out in terms of estimation error and effect on signal-to-noise ratio (SNR). The methods were able to estimates the RT within 0.2sec for RT ≤ 0.8sec and SNR ≥ 10dB. Thus, the key effect of additive noise on all methods is a positive bias of the estimation error which results in estimation error of e ≥ 0.2sec, which is an over-estimation. The results obtained shows that the methods can be used to accurately compare the reverberation time in an enclosed space with minimal effort.

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Section: Review Of the Related Literaturementioning

confidence: 99%

Comparison of Blind Reverberation Time Estimation in an Enclosed Space by Analysing Energy Decay Curve

Muhammad¹,

Abdullahi²,

Aliyu³

2023

FJS

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“…While reverberation is often described as diffused in time, recent acoustics measurement research has demonstrated that reverberant sound fields are not necessarily isotropic [22,23,6,24], and may have perceptually salient position-and direction-dependent decay characteristics [25], which should also be considered in 6dof auralization [26]. However, since the perceptual effect of anisotropic reverberation will vary from one room to another and the perceptual threshold of such characteristics has not yet been fully established, more research is required to fully understand this aspect.…”

Section: Introductionmentioning

confidence: 99%

A Dataset for Location- and Direction-Dependent Reverberation Analysis

Alary,

Politis

2022

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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Measuring room impulse responses (RIRs) is fundamental to sound reproduction and acoustical research. For instance, these measurements play an essential role in building digital twins in virtual reality to preserve their cultural heritage. For sound reproduction, RIRs can be used directly through convolution, or a more complex timefrequency domain analysis may be used to characterize a parametric method. Measuring RIRs using microphone arrays, such as a spherical microphone array, is necessary to extend this reproduction to the spatial domain. Recent work has shown that reverberant sound fields have perceptually salient position-and direction-dependent characteristics which should be considered in six degrees of freedom (6DoF) sound reproduction. However, related psychoacoustics and signal processing research require complex datasets to measure to better understand these characteristics. In this article, we present an experiment carried out in the main auditorium of the Finnish National Opera and Ballet in Helsinki, where we measured spatial RIRs from the perspective of ninety-seven individual seats. We analyze key characteristics of the resulting anisotropic and inhomogeneous sound field using energy-based analysis methods and the dataset is shared publicly to allow for further research in this field, such as multi-slope decay analysis and 6DoF auralization.

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Analysis of sound field isotropy based on directional energy decay curves

Cited by 2 publications

References 0 publications

Comparison of Blind Reverberation Time Estimation in an Enclosed Space by Analysing Energy Decay Curve

Comparison of Blind Reverberation Time Estimation in an Enclosed Space by Analysing Energy Decay Curve

A Dataset for Location- and Direction-Dependent Reverberation Analysis

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