A simple impulse sound source for measurements in room acoustics

Pavlovic, Dragana Sumarac; Mijic, Miomir; Kurtovic, Husnija

doi:10.1016/j.apacoust.2006.11.003

Cited by 26 publications

(12 citation statements)

References 7 publications

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“…(a) Shows the variation of the gradient at each step performed by the algorithm for adjusting the weights of the connections, as described in Equation (7). (b) Shows how the scalar parameter μ was used to balance the two contributions of the algorithm Newton and gradient descent changes, as described in Equation (10).…”

Section: Frequency Hzmentioning

confidence: 99%

“…Investigations carried out by statistically elaborating subjective judgments of many listeners have shown that, beyond the subjective evaluations, there are some objective parameters of the acoustic field capable of acoustically characterizing the spaces. Over the years, numerous scholars have proposed various methods of determining these parameters, assigning each of them a different weight [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Acoustic Characterization of Rooms Using Reverberation Time Estimation Based on Supervised Learning Algorithm

Ciaburro¹,

Iannace²

2021

Applied Sciences

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The measurement of reverberation time is an essential procedure for the characterization of the acoustic performance of rooms. The values returned by these measurements allow us to predict how the sound will be transformed by the walls and furnishings of the rooms. The measurement of the reverberation time is not an easy procedure to carry out and requires the use of a space in an exclusive way. In fact, it is necessary to use instruments that reproduce a sound source and instruments for recording the response of the space. In this work, an automatic procedure for estimating the reverberation time based on the use of artificial neural networks was developed. Previously selected sounds were played, and joint sound recordings were made. The recorded sounds were processed with the extraction of characteristics, then they were labeled by associating to each sound the value of the reverberation time in octave bands of that specific room. The obtained dataset was used as input for the training of an algorithm based on artificial neural networks. The results returned by the predictive model suggest using this methodology to estimate the reverberation time of any closed space, using simple audio recordings without having to perform standard measurements or calculate the integration explicitly.

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Section: Frequency Hzmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acoustic Characterization of Rooms Using Reverberation Time Estimation Based on Supervised Learning Algorithm

Ciaburro¹,

Iannace²

2021

Applied Sciences

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“…An impulsive sound can be created if two plates of wood are struck against each other. A study by Sumarac-Pavlovic et al [116] created and measured a specially designed wooden clapper intended to operate as a source for acoustic measurements. The clapper consists of two identical parts connected by a hinge, allowing the two parts to revolve around the same axis.…”

Section: Wooden Clappermentioning

confidence: 99%

Review of Acoustic Sources Alternatives to a Dodecahedron Speaker

Papadakis

Stavroulakis

2019

Applied Sciences

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An omnidirectional source is required in many acoustic measurements. Commonly a dodecahedron speaker is used but due to various factors (e.g., high cost, transportation difficulties) other acoustic sources are sometimes preferred. In this review, fifteen acoustic source alternatives to a dodecahedron speaker are presented while emphasis is placed on features such as omnidirectionality, repeatability, adequate sound pressure levels, even frequency response, accuracy in measurement of acoustic parameters and fulfillment of ISO 3382-1 source requirements. Some of the alternative acoustic sources have the appropriate features to provide usable results for acoustic measurements, some have acoustic characteristics better than a dodecahedron speaker (e.g., omnidirectionality in the high-frequency range), while some can potentially fulfill the ISO 3382-1 source requirements. Collected data from this review can be used in many areas (e.g., ISO measurements, head-related transfer functions measurements) for the appropriate selection of an acoustic source according to the expected use. Finally, suggestions for uses and future work are given aimed at achieving further advances in this field.

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“…Characteristics of reverberation of an impulsive sound reflect properties of the environment, more so than nonimpulsive signals [9], but the main concern here is with sounds occurring in non-reverberating environments, such as open fields.…”

Section: A Impulsive Soundsmentioning

confidence: 99%

On the Effectiveness of Dynamic Spectrum Management Algorithms in xDSL Networks

Smith

Pelaes

Monteiro

et al. 2010

Anais De VII International Telecommunications Symposium

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Gunshot detection finds application in the fields of law enforcement, forensic science, and defense (military applications). The first task of a sniper detector, aiming to estimate the direction of arrival of a given gunshot, is to detect automatically the presence of this audio event. Since it is a typical on-line application where a fast response is of paramount importance, a non (computationally) expensive procedure is needed. In a recent work, a simple procedure based on the correlation of the audio signal against a template has proved its efficiency as a gunshot detection algorithm. In this paper, we extend its evaluation to a noisy environment and assess its performance, in gunshot recognition and gunshot detection tasks, comparing it to other more complex methods.

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A simple impulse sound source for measurements in room acoustics

Cited by 26 publications

References 7 publications

Acoustic Characterization of Rooms Using Reverberation Time Estimation Based on Supervised Learning Algorithm

Acoustic Characterization of Rooms Using Reverberation Time Estimation Based on Supervised Learning Algorithm

Review of Acoustic Sources Alternatives to a Dodecahedron Speaker

On the Effectiveness of Dynamic Spectrum Management Algorithms in xDSL Networks

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