Alexander Sutin and a team of acoustics experts at Stevens Institute of Technology in New Jersey are developing a system that tracks the traffic by listening to the noise it produces. On Wednesday, October 28, they will present experimental data demonstrating the technology's ability to pick out and classify the sound of each boat in the throng at a meeting of the Acoustical Society of America (ASA) in San Antonio, TX.
As part of research conducted in the Center for Secure and Resilient Maritime Commerce (CSR), the national DHS Center of Excellence for Marine, Island and Port Security, Sutin and his team placed several underwater microphones ("hydrophones") in the Hudson River. These microphones recorded the din of engine and propeller noise produced by the ships above. They developed a computer algorithm that isolated each individual boat's sound and tracked its location based on how long the sound took to travel to each microphone.
The group was also able to classify each ship based on signature characteristics in its noise. Video cameras at the surface confirmed the accuracy of their technique.
"Classification parameters can be used like fingerprints to identify to identify what class a ship is," says Sutin.
The propellers of slow-moving boats like barges, for example, generate low-frequency modulation, while fast-moving speedboats produce high-frequency modulation. The team used special analysis techniques for extracting high-frequency modulation using low frequencies.
The team hopes to develop a database that keeps track of every individual ship's identity to assist various agencies, including the U.S. Coast Guard, with their missions.
The talk "Cross correlation of ship noise for water traffic monitoring" (3aUW7) by Laurent Fillinger is at 10:15 a.m. on Wednesday, October 28.
The talk "Passive acoustic classification of vessels in the Hudson River" (3aUW9) by Michael Zucker is at 10:45 a.m. on Wednesday, October 28.
Main meeting website: http://asa.aip.org/sanantonio/sanantonio.html
Full meeting program: http://asa.aip.org/sanantonio/program.html
Searchable index: http://asa.aip.org/asasearch.html
WORLD WIDE PRESS ROOM
ASA's World Wide Press Room (www.acoustics.org/press) contains additional tips on dozens of newsworthy stories and lay-language papers, which are ~500-word summaries of presentations written by scientists for a general audience and accompanied by photos, audio, and video.
We will grant free registration to credentialed full-time journalists and professional freelance journalists working on assignment for major news outlets. If you are a reporter and would like to attend, please contact Jason Bardi (firstname.lastname@example.org, 301-209-3091), who can also help to set with setting up interviews and obtaining images, sound clips, or background information.
ABOUT THE ACOUSTICAL SOCIETY OF AMERICA
The Acoustical Society of America (ASA) is the premier international scientific society in acoustics devoted to the science of technology of sound. Its 7,500 members worldwide represent a broad spectrum of the study of acoustics. ASA publications include The Journal of the Acoustical Society of America (the world's leading journal on acoustics), Acoustics Today magazine, books and standards on acoustics. The society also holds two major scientific meetings each year. For more information about ASA, visit our website at http://asa.aip.org.
Magnetic Quantum Objects in a "Nano Egg-Box"
25.07.2017 | Universität Wien
3-D scanning with water
24.07.2017 | Association for Computing Machinery
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
25.07.2017 | Physics and Astronomy
25.07.2017 | Earth Sciences
25.07.2017 | Life Sciences