Some research challenges of acoustic camera

Moulines, Éric

doi:10.1109/telfor.2011.6143725

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…Phased-array signal processing is one of the widely used techniques for acoustic emission (AE) remote sensing and measurements. Acoustic camera [19] is a modular system enabling such phased-array acoustic signal sensing and processing, and enables it to visualize acoustic field and localize acoustic emission sources. A basic configuration of acoustic camera is a microphone array, data recorder, and data processing software.…”

Section: Cameramentioning

confidence: 99%

Electromagnetic Compatibility and Radiation Analysis in Control Room

Kučera

Gutten

Šimko

et al. 2019

Measurement Science Review

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The article presents a theoretical analysis of electromagnetic compatibility (EMC) and experimental measurement of effects of radiation and acoustic emission of high-voltage transformers for electronic equipment and working personnel in a control room. Electromagnetic compatibility and safety of equipment are not considered as two distinct areas of study in electric and electronic safety. Economic criteria cannot compromise safety but at the same time immunity levels must be relevant in order to establish a “Functional Safety”. Introducing Special Immunity Levels in the level of equipment testing allows us to combine the two areas of EMC and safety. The measurement was carried out in high-current of very high-voltage distribution station. A real-life analysis of effects of electric and electromagnetic field was carried out. FFT was used for mathematical processing of data which were later presented in a graphical form of a spectrally analyzed area. In the last part of the paper we discuss the suitability of acoustic camera to perform contactless monitoring of the health and operation conditions of the power transformer by analyzing acoustic field generated by the transformer core and windings in near control room.

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Section: Cameramentioning

confidence: 99%

Electromagnetic Compatibility and Radiation Analysis in Control Room

Kučera

Gutten

Šimko

et al. 2019

Measurement Science Review

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“…The phase relationships between the acoustic signals are analyzed and the resultant localization of the sound source is mapped on a photography of the monitored scene. Acoustic camera itself represents just one stage in long history of microphone array technology development [14]. Possible applications of acoustic camera as test equipment include nondestructive measurements for noise/sound of road vehicles [15], trains and airplanes [16], [17], quantification of industrial noise [18], measurement of wind turbines [18], acoustical sensing in battlefield [20], obtaining acoustic images of seafloor hydrothermal flaws [21], underwater unmanned vehicles [20] and even observation of marine fauna [23].…”

Section: Acoustic Camera Principlementioning

confidence: 99%

3D printed acoustic camera for electric motor diagnostics

Orman¹,

Rzeszucinski²,

Pinto³

2014

Proceedings of the 2014 International Conference on Advanced ICT (ICAICTE 2014)

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-This paper focuses on the aspect of performing acoustic analysis for the purpose of electric motors diagnostics. The measurements are performed in noisy industrial environment with the use of a dedicated acoustic camera build by ABB. The acoustic camera comprises a set of microphones arranged in a pre-defined, carefully designed and manufactured shape. The great advantage of acoustic cameras is the sound measurements can be used to pin-point the exact location of the sound source in a monitored scene. This, in turn allows for the frequencies of interest to be separated from the background noise. The paper presents the result of comparing the acoustic camera outputs from two induction motor -a healthy motor and a motor suffering from a broken rotor bar fault. The presented results show that the acoustic camera is capable of detecting the characteristic electric motor fault and robustly localize it in space, which proves its robustness even in noisy industrial environment.

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“…Acoustic cameras have been employed in various fields, including engineering, bioacoustics, and marine conservation biology (Mueller et al, 2006;Orman and Pinto, 2013;Beeck et al, 2022;Bocanegra et al, 2022). These cameras facilitate noise/sound detection and provide a visualization of the acoustic environment through phase array processing of acoustic signals (Eric, 2011). They consist of a microphone array and a video camera, enabling an overlay of the acoustic image on the recorded video to illustrate sound sources in space (Eric, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…These cameras facilitate noise/sound detection and provide a visualization of the acoustic environment through phase array processing of acoustic signals (Eric, 2011). They consist of a microphone array and a video camera, enabling an overlay of the acoustic image on the recorded video to illustrate sound sources in space (Eric, 2011). Airborne acoustic camera systems have been particularly useful under laboratory conditions, for instance, recording typical and atypical ultrasound communication in mice, measuring the nasality of sounds in human speech, or capturing the diving sounds of Costa's hummingbirds (Calypte costae) (Clark and Mistick, 2018;Lorenc et al, 2018;Rhinehart et al, 2020;Matsumoto et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Using acoustic cameras to study vocal mobbing reveals the importance of learning in juvenile Arabian babblers

Guggenberger,

Boonman,

Keynan

et al. 2024

Front. Bird Sci.

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IntroductionWhen studying bird intra- and inter-specific interactions it is crucial to accurately track which individual emits which vocalization. However, locating sounds of free moving birds (and other animals) in nature can be challenging, especially in situations when many individuals call in spatial and temporal vicinity.MethodsIn this paper, we will introduce the use of a hand-held acoustic camera which allows solving this problem. The system comprises 64 microphones each sampling a wide angle at a rate of 200kHz. The system can localize up to dozens of nearby callers and it displays them on a visual image. We applied the system to localize and record vocalizations of Arabian babblers (Argya squamiceps) during snake-mobbing behavior to demonstrate its potential. As the recorded babblers are ringed and therefore identifiable, we could use the calling order to analyze the vocalizing mob and to reconstruct a vocal social network depicting which individuals call after which individuals.ResultsAcoustic analysis revealed that Arabian babblers call in a periodic pattern and with age specific pause lengths between different individuals. Mobbing events with young babblers display a lower vocal network density compared to only adult groups.DiscussionOur approach demonstrates how this novel technology can be applied to reveal new insight about vocal events in group living wild animals. The approach can be elaborated to study intra- and inter-specific animal vocalizations.

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Some research challenges of acoustic camera

Cited by 10 publications

References 5 publications

Electromagnetic Compatibility and Radiation Analysis in Control Room

Electromagnetic Compatibility and Radiation Analysis in Control Room

3D printed acoustic camera for electric motor diagnostics

Using acoustic cameras to study vocal mobbing reveals the importance of learning in juvenile Arabian babblers

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