Stories
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Facility Focus: Materials
In October 1962, the U.S. Army Aeromedical Research Unit was established with a goal of providing specialized medical and physiological support to help close the gap between Army combat...
Briefs: Aerospace
NASA Langley Research Center has developed a new approach for designing aircraft liner cores for noise reduction. The cores are comprised of multiple honeycomb-shaped chambers, each...
Briefs: Test & Measurement
Many applications require detection of both very small and very large signals. High-gain detector amplifiers provide low noise, but are easily swamped by large signals. Logarithmic amplifiers provide a wide...
Briefs: Sensors/Data Acquisition
Device for Providing Real-Time Rotorcraft Noise Abatement Information
Rotorcraft typically operate near the ground throughout the duration of the operation. For this reason, military rotorcraft are vulnerable to acoustic detection, and public acceptance of civil rotorcraft is limited by annoyance caused by rotor noise radiation. The purpose of this...
Briefs: Sensors/Data Acquisition
A Robust Waveguide Millimeter-Wave Noise Source
A noise source is an enabling technology for passive millimeter-wave remote sensing applications such as atmospheric sounding, and precipitation and ice cloud measurements. NASA Goddard Space Flight Center has developed a packaged noise source that will allow calibration of the front end at the...
Briefs: Materials
Researchers at NASA’s Glenn and Langley Research Centers have developed a groundbreaking bio-mimicking acoustic liner for quieting noisy environments. Conventional approaches have not been able to absorb...
Briefs: Sensors/Data Acquisition
Microphones, from those in smartphones to hearing aids, are built specifically to hear the human voice — humans can’t hear at levels higher than 20 kHz, and microphones max out at...
Briefs: Aerospace
NASA’s Langley Research Center has developed a landing gear cavity modification that reduces noise produced during aircraft approach and landing. The modification is an innovative stretchable mesh...
Briefs: Photonics/Optics
Time of flight is an approach that gauges distance by measuring the time it takes light projected into a scene to bounce back to a sensor. In time-of-flight imaging, a short burst of light is fired into...
Briefs: Electronics & Computers
A new approach was developed that overcomes the limitation of conventional chip-testing methods on 3D chips, which include many thin horizontal “floors” connected to one another by vertical...
Briefs: Communications
A new high-isolation RF circulator provides enhanced detection ranges (radar) and improved reception (communications) by reducing signal leakage and undesirable internal reflections between ports...
Briefs: Materials
NASA’s Langley Research Center has developed a deployable and stowable mechanical design for filling the cavity behind the leading-edge slat (i.e., slat cove) when it is extended upon landing an aircraft....
Briefs: Mechanical & Fluid Systems
NASA's Marshall Space Flight Center (MSFC) developed a foam-rigidized, inflatable, tubular space boom that can be transported, deployed, and inflated at remote locations. The lightweight device...
Briefs: Aerospace
A system of nozzles and pylons that redistributes jet exhaust noise sources upstream to reduce jet noise has been developed. Certain aircraft configurations install the propulsion...
Briefs: Aerospace
Researchers at NASA's Armstrong Flight Research Center (AFRC) recently completed a study of the feasibility of aerial towing an unpiloted, sub-scale vehicle to supersonic flight conditions to examine the...
Briefs: Semiconductors & ICs
Front-end electronics for capacitive sensors typically include a preamplifier followed by a filter. The preamplifier provides low-noise amplification of the signals induced in the sensor electrodes....
Briefs: Aerospace
NASA Langley Research Center has developed two new implementations of acoustic liners for aircraft noise reduction whereby curved channels within tight spaces can be outfitted to provide noise reduction....
Briefs: Aerospace
NASA Langley Research Center, in collaboration with Boeing and Lockheed Martin, has developed a new external acoustic liner for aircraft noise reduction. While the acoustic liner can be placed on any...
Articles: Sensors/Data Acquisition
This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.
Briefs: Software
Acoustic Propagation and Emulation Toolset (APET)
Currently, APET includes a modified version of the Rotorcraft Noise Model (RNM, version 7). It also includes the newly developed Spectral Attenuation Method (SAM), which contains the Ray Tracing Program (RTP) and two versions of a Green's Function Parabolic Equation (GFPE) code. The third component...
Briefs: Photonics/Optics
Measurements of the cosmic microwave background are a powerful probe of the early universe. Part-per-million fluctuations in the intensity of background trace the initial...
Briefs: Sensors/Data Acquisition
NASA's Langley Research Center has developed a magnetometer that takes advantage of the unique variable permeability properties of Metglas 2714A magnetic...
Briefs: Test & Measurement
NASA’s Langley Research Center researchers developed DAMAS using an iterative algorithm to deconvolute noise signals, allowing for more...
Briefs: Test & Measurement
Method of Adjusting Acoustic Impedances for Impedance-Tunable Acoustic Segments
NASA’s Langley Research Center researchers have developed an adaptive noise-reduction system that optimizes impedance in an aircraft engine. Aerospace and automotive engineers can take advantage of this innovative system that offers a superior approach to noise...
Briefs: Aerospace
Improvements to the Functional Beamforming Formula
The purpose of this work is to improve the signal-to-noise ratio of acoustic measurements made in a wind tunnel with a microphone phased array. The functional beamforming method is improved to compensate for effects of acoustic propagation through turbulence, and to correct for inaccurate steering...
Briefs: Aerospace
NASA’s Langley Research Center researchers have developed a novel noise reduction system for jet engines. Aircraft jet engine noise is a major issue for airports, the communities...
Briefs: Aerospace
This technology is a new type of aircraft pylon design for noise control. A pylon connects the engine to the airframe of an aircraft. This design uses air passing through the pylon to actively disrupt...
Briefs: Aerospace
NASA’s Langley Research Center has created novel flow effector technology for separation control and enhanced mixing. The technology allows for variable shape control of aircraft structure through...
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Webcasts
Upcoming Webinars: Sensors/Data Acquisition
From Spreadsheets to Insights: Fast Data Analysis Without Complex...
Upcoming Webinars: Electronics & Computers
Cooling a New Generation of Aerospace and Defense Embedded...
Upcoming Webinars: AR/AI
Beyond AI-Copy-Paste Engineering: Advanced AI-Integration Success...
Upcoming Webinars: Power
Battery Abuse Testing: Pushing to Failure
Upcoming Webinars: AR/AI
A FREE Two-Day Event Dedicated to Connected Mobility
Upcoming Webinars: Test & Measurement
Choosing the Right N-Port Strategy: Multiport VNAs vs. Switch...
