Localization of sound sources by means of unidirectional microphones

Rizzo, Piervincenzo; Bordoni, Giacomo; Marzani, Alessandro; Vipperman, Jeffrey S.

doi:10.1088/0957-0233/20/5/055202

Cited by 8 publications

(8 citation statements)

References 26 publications

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“…In order to apply the semi-analytical approach described in ref. [5], the equation of the PDP is necessary. The values of the normalized ppk at 1200 Hz as a function of the azimuth angle were calculated by using the MATLAB function fit and the Fourier polynomial type.…”

Section: Analytical Polar Patternmentioning

confidence: 99%

“…In a recent paper Rizzo et al [5] proposed a passive scheme based on UMs and amplitude-based features. UMs are sound transducers that possess a strong dependence on the incidence angle of the acoustic source.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the work of ref. [5] has been expanded. The directivity of UMs is exploited to estimate the direction of the incoming sound.…”

Section: Introductionmentioning

confidence: 99%

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Microphones' directivity for the localization of sound sources

Rizzo¹,

Tajari²,

Spada³

2011

SPIE Proceedings

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In a recent paper [P. Rizzo, G. Bordoni, A. Marzani, and J. Vipperman, "Localization of Sound Sources by Means of Unidirectional Microphones, Meas. Sci. Tech., 20, 055202 (12pp), 2009] the proof-of-concept of an approach for the localization of acoustic sources was presented. The method relies on the use of unidirectional microphones and amplitude-based signals' features to extract information about the direction of the incoming sound. By intersecting the directions identified by a pair of microphones, the position of the emitting source can be identified. In this paper we expand the work presented previously by assessing the effectiveness of the approach for the localization of an acoustic source in an indoor setting. As the method relies on the accurate knowledge of the microphones directivity, analytical expression of the acoustic sensors polar pattern were derived by testing them in an anechoic chamber. Then an experiment was conducted in an empty laboratory by using an array of three unidirectional microphones. The ability to locate the position of a commercial speaker placed at different positions in the room is discussed. The objective of this study is to propose a valid alternative to the common application of spaced arrays and therefore to introduce a new generation of reduced size sound detectors and localizers. The ability of the proposed methodology to locate the position of a commercial speaker placed at different positions in the room was evaluated and compared to the accuracy provided by a conventional time delay estimate algorithm.

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Section: Analytical Polar Patternmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microphones' directivity for the localization of sound sources

Rizzo¹,

Tajari²,

Spada³

2011

SPIE Proceedings

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“…However, these techniques typically require larger microphone arrays in order to maximize the delay experienced by the different nodes [9]. Other work [10] has demonstrated the feasibility of amplitude-based sound localization. However, this focused on large, high quality microphones operating a fixed distance.…”

Section: Introductionmentioning

confidence: 99%

Acoustic sensors for biobotic search and rescue

Whitmire

Latif

Bozkurt

2014

IEEE SENSORS 2014 Proceedings

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Advances in neural engineering have enabled direct control of insect locomotion. Insect biobots, with a natural ability to crawl through small spaces, offer unique advantages over traditional synthetic robots. A cyberphysical network of such biobots could prove useful for search and rescue applications in uncertain disaster environments. Our previous work has demonstrated control of Madagascar hissing cockroaches using a Kinect-based computer vision platform. We now demonstrate lowpower insect-mounted acoustic sensors for future use in both environmental mapping and localization of trapped survivors. Our experimentation has shown the capability of an insect mounted array of microphones to localize a sound source.

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“…Also sound intensity 3D-measurements have been used to estimate the source direction relative to the receiver [10]. Other methods using directional microphones completely locate the source from the sound amplitude [11]. When multiple sources may be present at the same time the previous methods don'tw ork as well, and often microphone array beamforming is used [12].…”

Section: Introductionmentioning

confidence: 99%

Passive Acoustic Method for Tracking Moving Sound Sources

Genescà¹,

Garbí²,

Pàmies³

et al. 2011

Acta Acustica united with Acustica

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This paper presents an acoustic method to obtain the instantaneous velocity and position of am oving sound source following an unknown 3D path provided that the position of the source is known at arandom time instant. The method involves am esh of at least 7a coustic receivers distributed in the acoustic influence area of the source, and assumes that the background noise is uncorrelated between them. It is necessary to knowthe position of the source at arandom instant in order to compensate for the propagation time delay between the signals of the receivers. The method focuses on the relative Doppler Effect between ar eference microphone and the rest to obtain the velocity and position at every time instant. The performance of the method has been simulated and experimentally tested in the case of am oving sound source travelling in al inear path, and the location errors obtained in both cases are acceptable.

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Localization of sound sources by means of unidirectional microphones

Cited by 8 publications

References 26 publications

Microphones' directivity for the localization of sound sources

Microphones' directivity for the localization of sound sources

Acoustic sensors for biobotic search and rescue

Passive Acoustic Method for Tracking Moving Sound Sources

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