Investigation and correction of error in impedance tube using intelligent techniques

J, Niresh; Neelakrishnan, S.; Rani, Shweta

doi:10.1016/j.jart.2016.09.003

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…The most recent designs in compliance with ISO standards can be referred to the works [45,46]. The work by Niresh et al [47] provides insights into recent developments on error corrections.…”

Section: Two Microphone Methods (Smm)mentioning

confidence: 99%

An Overview of Acoustic Impedance Measurement Techniques and Future Prospects

et al. 2021

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In order to progress in the area of aeroacoustics, experimental measurements are necessary. Not only are they required for engineering applications in acoustics and noise engineering, but also they are necessary for developing models of acoustic phenomenon around us. One measurement of particular importance is acoustic impedance. Acoustic Impedance is the measure of opposition of acoustical flow due to the acoustic pressure. It indicates how much sound pressure is generated by the vibration of molecules of a particular acoustic medium at a given frequency and can be a characteristic of the medium.The aim of the present paper is to give a synthetic overview of the literature on impedance measurements and to discuss the advantage and disadvantage of each measurement technique. In this work, we investigate the three main categories of impedance measurement techniques, namely reverberation chamber techniques, impedance tube techniques, and far-field techniques. Theoretical principles for each technique are provided along with a discussion on historical development and recent advancements for each technique.

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Section: Two Microphone Methods (Smm)mentioning

confidence: 99%

An Overview of Acoustic Impedance Measurement Techniques and Future Prospects

et al. 2021

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“…As such, any inaccuracies should affect all three style measurement protocols in similar fashion, as well as the new CSMM proposed method described herein. As all of the standard methods have rich literature covering experimental sources of errors, these types of errors will not be covered again here; for more details, the interested reader is referred to [5,6] and Niresh et al [20].…”

Section: External Accuracy Factorsmentioning

confidence: 99%

Simplified Three-Microphone Acoustic Test Method

2017

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Accepted acoustic testing standards are available; however, they require specialized hardware and software that are typically out of reach economically to the occasional practitioner. What is needed is a simple and inexpensive screening method that can provide a quick comparison for rapid identification of the top candidates. This research reports on the development of an acoustical rapid-test method that achieves these objectives. The method is based upon a reformulation of the well-regarded three-microphone method. The new formulation reduces the number of required microphones to a single microphone and removes the need for simultaneous capture and extensive signal-processing analysis. The study compares the proposed simplified method to two standard methods and the three-microphone method. The results of the correlation analysis between the new method versus the original method produced a coefficient of determination of r 2 = 0.994. A simulation study highlighted several unique accuracy advantages of this new proposed method in comparison to the existing standard methods. The proposed new method represents an easy-to-use technique that requires little in the way of equipment and can be set up with minimal training and expense.

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“…Muitas vezes, são desconsiderados efeitos de dispersão, de posicionamento e dimensão dos microfones, rugosidade e assimetrias nas superfícies da guia, entre outros. Para realizar ensaios controlados, tem se usado sistemas com redes neurais para ajustar esse tipo de erro (NIRESH, 2016).…”

Section: Desafios Correntesunclassified

Análise dinâmica de modos de propagação sonora e projeto de instrumentação expandida para tubo de impedância

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Essa dissertação simboliza um ciclo de quase dez anos aprendendo, ensinando e convivendo com muitas pessoas na Escola de Engenharia de São Carlos da Universidade de São Paulo, a que devo meu amadurecimento enquanto ser humano, profissional e cientista.Agradeço aos meus pais, Rizete e Bosco, e ao meu irmão, Júnior, por terem investido suas confianças no meu potencial e, principalmente, por terem dado a oportunidade de me dedicar aos estudos e ao meu treinamento profissional. Infelizmente nem todas as pessoas têm as oportunidades que eu tive na vida. Por isso, sou eternamente grato.Agradeço aos amigos e amigas que me acompanharam nessa jornada, pelo apoio, por acreditarem em mim, por me ouvirem desabafar angústias e incertezas. Àqueles da graduação Palavras-chave: acústica; propagação sonora; equações diferenciais; tubo de impedância; instrumentação acústica.

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Investigation and correction of error in impedance tube using intelligent techniques

Cited by 8 publications

References 19 publications

An Overview of Acoustic Impedance Measurement Techniques and Future Prospects

An Overview of Acoustic Impedance Measurement Techniques and Future Prospects

Simplified Three-Microphone Acoustic Test Method

Análise dinâmica de modos de propagação sonora e projeto de instrumentação expandida para tubo de impedância

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