APPLICATION OF THE SELECTIVE TWO-MICROPHONE ACOUSTIC INTENSITY METHOD FOR NOISE SOURCE IDENTIFICATION.

Martin W. Trethewey

doi:10.3397/1.2827700

APPLICATION OF THE SELECTIVE TWO-MICROPHONE ACOUSTIC INTENSITY METHOD FOR NOISE SOURCE IDENTIFICATION.

Martin W. Trethewey

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A selective method to separate the acoustic intensity vector, estimated from two closely spaced microphones, into components related to the individual sources is discussed. The method, which is based on the application of a multiple-input/two-output frequency domain model, is briefly reviewed. Pragmatic concerns regarding the phase matching of the microphones and model validation are discussed. The method is applied to a power hand drill to separate the cooling air flow noise from the mechanical vibration-related noise. The analysis showed that the flow noise was the dominant broadband source while the vibration related component was tonal in nature and dominant in specific frequency regions.

Original language	English (US)
Pages (from-to)	22-29
Number of pages	8
Journal	Noise control engineering
Volume	30
Issue number	1
DOIs	https://doi.org/10.3397/1.2827700
State	Published - 1988

All Science Journal Classification (ASJC) codes

Engineering(all)

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10.3397/1.2827700

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abstract = "A selective method to separate the acoustic intensity vector, estimated from two closely spaced microphones, into components related to the individual sources is discussed. The method, which is based on the application of a multiple-input/two-output frequency domain model, is briefly reviewed. Pragmatic concerns regarding the phase matching of the microphones and model validation are discussed. The method is applied to a power hand drill to separate the cooling air flow noise from the mechanical vibration-related noise. The analysis showed that the flow noise was the dominant broadband source while the vibration related component was tonal in nature and dominant in specific frequency regions.",

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AB - A selective method to separate the acoustic intensity vector, estimated from two closely spaced microphones, into components related to the individual sources is discussed. The method, which is based on the application of a multiple-input/two-output frequency domain model, is briefly reviewed. Pragmatic concerns regarding the phase matching of the microphones and model validation are discussed. The method is applied to a power hand drill to separate the cooling air flow noise from the mechanical vibration-related noise. The analysis showed that the flow noise was the dominant broadband source while the vibration related component was tonal in nature and dominant in specific frequency regions.

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APPLICATION OF THE SELECTIVE TWO-MICROPHONE ACOUSTIC INTENSITY METHOD FOR NOISE SOURCE IDENTIFICATION.

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