Keyword: Acoustics

Briefs: Software
Innoslate software tool formally models the process of conducting test range events.
Articles: Unmanned Systems
A number of science and technology efforts are helping to deliver new combat capability to warfighters.
Application Briefs: RF & Microwave Electronics
DSIT Solutions Ltd., recently supplied a NATO country with its PointShield Portable Diver Detection Sonar (PDDS) system.
Application Briefs: Sensors/Data Acquisition
The SwordFish™ is capable of underwater target search, detection, tracking, and classification.
Application Briefs: Defense
A Portable Acoustic Range system measures noise radiated by submarines, as well as surface vessels.
Briefs: Sensors/Data Acquisition
Understanding what affects acoustic waves propagating in the atmosphere is important for a variety of military applications.
Briefs: Aerospace

The U.S. Navy is interested in strategies that divers could employ to protect them from loud underwater sounds. Sonar...

Articles: Aerospace

Sintered fiber metal composites are used in aircraft as an acoustic media within environmental ducting, inlet and exhaust systems. The material can be engineered to meet...

Briefs: Photonics/Optics

One obstacle in the scaling of high-power fiber lasers arises because of nonlinear effects (e.g., stimulated...

Application Briefs: Aerospace
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BAE Systems has awarded Brüel & Kjær a Design Development Agreement to deliver a Hull Vibration Monitoring...

Application Briefs: Defense

An optical detector technology from Cal Sensors detects muzzle flash from over 100 meters away. Operating at the speed of light, optical flash detection systems provide an almost instantaneous response...

Briefs: Materials

An acoustic crystal composed of tightly packed spherical particles can exhibit a wide spectrum of acoustic properties with responses varying from linear to highly nonlinear...

Briefs: Physical Sciences
Acoustic Detection Using Reverberation

Acoustic detection of undersea objects is difficult due to the uncertain environment and even more difficult when the objects are buried in the seabed. First, sediments generate high backscattering noise due to heterogeneous scatters within the sediments, clouding the object.

Briefs: Electronics & Computers
Dense Transducer Array

A dense transducer array is an acoustic transducer with relatively high operational bandwidth. It includes a cable harness component that provides and organizes various conductors within piezocomposite substrates to form transducer arrays with minimum impact on electroacoustic performance. Several underwater sonar...

Briefs: Physical Sciences
Battery Electrolyte Level Detector Apparatus

An apparatus has been developed for checking the electrolyte level in a battery, providing a safer and more efficient means to do so. The result is a non-intrusive apparatus and method of checking the electrolyte level that reduces the need to open the caps on the battery by checking the level...

Briefs: Physical Sciences

A novel outdoor synthetic aperture acoustic (SAA) system consists of a microphone and loudspeaker traveling along a 6.3-meter rail system. This is an extension of a prior indoor...

Briefs: Materials
Flexible Biohybrid Nanomembranes for Multifunctional Sensors

A document describes recent activities in a continuing effort to develop devices, based on biohybrid nanomembranes, that would perform diverse sensory functions. The term "biohybrid nanomembranes" signifies flexible organic/inorganic composite membranes, of the order of tens of...

Briefs: Materials

Afamily of improved encapsulating materials for protecting underwater acoustic sensors has been invented. These materials could also be used for encapsulation or protective coating of...

Briefs: Materials
Castable, Relatively Stiff Acoustic-Damping Materials

A recently invented family of acoustic-damping materials offers advantages over prior acoustic-damping materials:

Briefs: Photonics/Optics

Optical-fiber infrasound sensors (OFISs) are being developed for detecting acoustic pressures in the frequency range from a few millihertz to a few hertz. As explained below, these sensors were conceived to...

Briefs: Physical Sciences

Embedded OEM application markets such as the military and aerospace industries are experiencing a growing demand for sensors that provide instantaneous and continuous...