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Monitoring industrial acoustics with distributed acoustic sensing
The Journal of the Acoustical Society of America, 2022True-phase distributed acoustic sensing (DAS), a technique which uses low-power laser pulses to monitor along-fiber strain in optical cable, has proven useful in many geophysical research areas, including down-hole monitoring in oil/gas extraction, near-surface characterization, detecting and locating regional and global earthquakes, urban monitoring ...
Derrick Chambers +3 more
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Distributed Acoustic Sensing for Seismic Monitoring
Optical Fiber Communication Conference (OFC) 2021, 2021Optical fiber networks can be transformed into powerful seismic sensing arrays through Distributed Acoustic Sensing (DAS). We review here the principles of DAS and the opportunities it offers in seismic monitoring, particularly in the sea-bottom.
Gonzalez-Herraez, Miguel +9 more
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Acoustic monitoring of hydrocyclones
Powder Technology, 2002This paper considers a case study of using non-intrusive passive acoustic sensors for on-line monitoring of hydrocyclone performance. Acoustic emissions generated within a hydrocyclone treating fine silica slurries were collected using a single 190-kHz piezoelectric sensor mounted externally on the conical section of the hydrocyclone. The investigation
R Hou, A Hunt, R.A Williams
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The Journal of the Acoustical Society of America, 1998
For a number of years railroad wheels were used as test objects in developing acoustic signature monitoring techniques. This work will be reviewed as well as later laboratory studies using beams to determine the sensitivity of the method. Cracks and other defects can cause shifting and splitting of resonance frequencies, so that these changes can be ...
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For a number of years railroad wheels were used as test objects in developing acoustic signature monitoring techniques. This work will be reviewed as well as later laboratory studies using beams to determine the sensitivity of the method. Cracks and other defects can cause shifting and splitting of resonance frequencies, so that these changes can be ...
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On Acoustic Monitoring of Rainfall Intensity
2025 33rd European Signal Processing Conference (EUSIPCO)Audio-based environmental monitoring is gaining ever-increasing interest in the last decades facilitating a wide range of applications. An emerging task concerns the automatic estimation of rainfall intensity based on the respective acoustic activity.
Monti, Carlo, Ntalampiras, Stavros
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Acoustic Environmental Monitoring System for Acoustic Maps
2008 The Second International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies, 2008In this work, it is developed a data acquisition and analysis system for the monitoring of acoustic environmental noises and the elaboration of dynamic acoustic maps. This project is based on the obtaining of acoustic data in different measure points, and it is formed by a mesh of connections based on GPRS NODES and a Software Server for the ...
Jesús Alba +4 more
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The Journal of the Acoustical Society of America, 2003
A method of determining the reaction efficiency of a CVD process reactor by which a reactive gas combination entering the reactor deposits a solid reaction product as a thin film onto a substrate. The composition of the reactive gas combination is measured by an acoustic cell which is disposed downstream from the outlet port of the reactor to determine
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A method of determining the reaction efficiency of a CVD process reactor by which a reactive gas combination entering the reactor deposits a solid reaction product as a thin film onto a substrate. The composition of the reactive gas combination is measured by an acoustic cell which is disposed downstream from the outlet port of the reactor to determine
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Standard for acoustic metadata for passive acoustic monitoring
The Journal of the Acoustical Society of America, 2019Passive acoustic monitoring often relies on data collected with various instrumentation, by multiple research groups in different locations, under diverse conditions, and with a variety of data analysis methods. To make the output comparable and to preserve data for long time-series analysis, metadata needs to be reported in a standardized way.
Simone Baumann-Pickering, Marie A. Roch
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Proceedings of 17th International Conference of the Engineering in Medicine and Biology Society, 2002
The Army Research Laboratory has developed sensor technology to monitor patient condition by gathering and analyzing acoustic data. Acoustic signature analysis can indicate cessation of breathing or heartbeat. Advanced signal-processing techniques can determine the proper level of response for the indicated condition, and alert attendants via ...
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The Army Research Laboratory has developed sensor technology to monitor patient condition by gathering and analyzing acoustic data. Acoustic signature analysis can indicate cessation of breathing or heartbeat. Advanced signal-processing techniques can determine the proper level of response for the indicated condition, and alert attendants via ...
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Acoustically monitored manometer
The Journal of the Acoustical Society of America, 1988A U-tube manometer for calibrating a differential pressure transducer or the like, wherein the height of working fluid in each column may be determined by the two-way travel time of an acoustic pulse launched from the top of each column against the top of the working fluid.
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