Noise, Vibration, and Harshness (NVH)
Acoustics
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News Communications
Rosetta Echo Advanced Payloads (REAP) Pod
General Atomics Aeronautical Systems, Inc. (GA‑ASI) has completed a flight demonstration of the Rosetta Echo Advanced Payloads (REAP) pod on an MQ-9A remotely piloted aircraft (RPA).
News Mechanical & Fluid Systems
WCX 2023: Biomimicry Inspires Product Development
Nature has always served as a giant classroom where problem-solving lessons are taught — a “storehouse of inspiration for new and different ideas,” noted Trisha Brown, co-director of...
Technology Report Manufacturing & Prototyping
Turning the Vehicle into a Giant Microphone
When an emergency vehicle is approaching but its blaring siren isn’t heard by nearby motorists, all are put at risk. Engineers at Harman International have developed novel sensor technology that...
Technology Report Power
Electrification Forces Fresh Perspectives on Vehicle NVH
The quietness of EVs is, for many, a compelling selling point. But vehicles becoming inherently quieter overall hasn’t translated into making the job of noise abatement any easier...
Technology Report Test & Measurement
Expanding the ‘Bubble’ of Cabin Acoustics
Noise cancellation has been a viable technology for many years, used on board turboprop aircraft to counter engine noise and familiar to consumers when applied to headphones to reduce...
Application Briefs Communications
Underwater Acoustic Communication System
DSIT Solutions Givat Shmuel, Israel+(972-3) 531-3333www.dsit.co.il DSIT Solutions recently launched WhitePointer, a state-of-the-art underwater acoustic communication system that enables simultaneous...
Briefs Test & Measurement
Formal Process Modeling to Improve Human-Decision-Making During Test and Evaluation Range Control
Innoslate software tool formally models the process of conducting test range events.
Articles Unmanned Systems
Using Low-Frequency Broadband Sonar on UUVs
A number of science and technology efforts are helping to deliver new combat capability to warfighters.
Application Briefs RF & Microwave Electronics
Portable Diver Detection Sonar System
DSIT Solutions Ltd., recently supplied a NATO country with its PointShield Portable Diver Detection Sonar (PDDS) system.
Articles Automotive
Metamaterials R&D Targets NVH Abatement
Acoustics engineers have a broad variety of materials from which to choose for reducing noise, vibration and harshness (NVH) in vehicles. But their selection often comes with a measurable downside:...
Application Briefs Sensors/Data Acquisition
Towed Array Sonar System
The SwordFish™ is capable of underwater target search, detection, tracking, and classification.
Application Briefs Defense
Underwater Signal Processing System
A Portable Acoustic Range system measures noise radiated by submarines, as well as surface vessels.
Briefs RF & Microwave Electronics
Green’s Function Extraction from Atmospheric Acoustic Propagation
Understanding what affects acoustic waves propagating in the atmosphere is important for a variety of military applications.
Briefs Mechanical & Fluid Systems
Sound Attenuation of Neoprene Wetsuit Hoods as a Function of Dive Depth and Acoustic Frequency: Hyperbaric Chamber Trials
The U.S. Navy is interested in strategies that divers could employ to protect them from loud underwater sounds. Sonar...
Technology Report Power
2020 Explorer Will Be First Product to Emerge – More Quietly – from Ford’s Newest NVH Lab.
The 2020 Explorer will be the first Ford product engineered via the automakers new driving dynamics laboratory, which provides multiple tools...
News Automotive
NASA Picks Lockheed to Build Low-Boom X-Plane
In April, NASA took another major step toward reintroducing supersonic flight with an award to Lockheed Martin Aeronautics Company to design, build, and test a supersonic aircraft to reduce...
News Materials
Made in Space to Increase Material Portfolio After Two Years of Printing in Space
Made In Space, Inc. (MIS) is celebrating the two-year anniversary of the Additive Manufacturing Facility (AMF) printing onboard the International Space Station...
News Manned Systems
X Marks the Spot
LiquidPiston Inc., an advanced internal combustion engine (ICE) technology company, has reimagined combustion engines with a new platform that can run on multiple fuels, including diesel, jet fuel, and gasoline. This...
Articles Aerospace
Using Sintered Fiber Metal Composites for Aircraft Acoustic Attenuation
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
Stimulated Brillouin Scattering (SBS) Suppression and Long Delivery Fibers at the Multikilowatt Level with Chirped Seed Lasers
One obstacle in the scaling of high-power fiber lasers arises because of nonlinear effects (e.g., stimulated...
Application Briefs Sensors/Data Acquisition
Hull Vibration Monitoring System
Brüel & KjærNærum, Denmark+45 7741 2000For more info click here BAE Systems has awarded Brüel & Kjær a Design Development Agreement to deliver a Hull Vibration Monitoring System (HVME) for the UK...
Application Briefs Defense
Optical Muzzle Flash Detection Sensors
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 to...
Briefs Materials
Nonlinear Acoustic Metamaterials for Sound Attenuation Applications
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 externally.
Briefs Physical Sciences
Outdoor Synthetic Aperture Acoustic Ground Target Measurements
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 nanometers...
Briefs Materials
Low-Water-Permeability Encapsulants for Acoustic Sensors
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...
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