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Diffuse field acoustic testing is the testing of the mechanical resistance of a spacecraft to the acoustic pressures during launch.
In the aerospace industry, acoustic chambers are the main facilities for such tests. A chamber is a reverberant room that creates a diffuse sound field and is composed of an empty volume (from 1 m3 to 2900 m3) and a multifrequency sound generation system.
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Diffusefieldacoustictesting is the testing of the mechanical resistance of a spacecraft to the acoustic pressures during launch. In the aerospace industry...
designed to create reverberation, a diffuse or random incidence sound field (i.e. one with a uniform distribution of acoustic energy and random direction of...
reflection from a hard flat surface is giving a problematic echo then an acousticdiffuser may be applied to the surface. It will scatter sound in all directions...
{p}{Q}}={\frac {F}{vS^{2}}}} Commonly used acoustical couplers are free field, diffusefield and compression chamber. For free field conditions between the two microphones...
systems use a different set of field instrumentation (for example infrared radiometers or thermal cameras, vapor sensors, acoustic microphones or fiber-optic...
correction factors to allow laboratory electrical and acoustictesting to better mimic Free field (acoustics) responses. Each correction used should be...
Ultrasonic piezo sensors are used in the detection of acoustic emissions in acoustic emission testing. Piezoelectric transducers can be used in transit-time...
does not significantly decrease the admittance. When acoustic reflex testing is conducted, the acoustic reflex thresholds (ART) cannot be determined when...
make the sound diffuse and harsh, especially with smaller venues and hard reflective surfaces. Sound absorbing structures, sound diffusing structures, and...
best therapies and treatments for individual patients. Diffuse optical imaging (DOI) or diffuse optical tomography (DOT) is a medical imaging modality...
transmittance, sensors and active sources, and acoustic cloaking. The research in the field of metamaterials has diffused out into the American government science...
xanthoastrocytoma), that often are clearly outlined on diagnostic images Diffuse zones of infiltration (e.g., high-grade astrocytoma), that share various...
language processing, machine learning, nondestructive testing, slope stability analysis and many other fields.[citation needed] Starting with the effects to...
emergency situation. Electrochemical gas detectors work by allowing gases to diffuse through a porous membrane to an electrode where it is either chemically...
Kyu-Hyun; et al. (20 November 2020). "Testing the Strong Equivalence Principle: Detection of the External Field Effect in Rotationally Supported Galaxies"...
image receiver (screen, detector, or film) and reduces the incidence of diffuse radiation on it. The first diffusion radiation grid was developed in 1913...
reflection. Reflections of radiation that undergo scattering are often called diffuse reflections and unscattered reflections are called specular (mirror-like)...
type is the valveless pulsejet. The technical terms for this engine are acoustic-type pulsejet, or aerodynamically valved pulsejet. One notable line of...
1086/282171. S2CID 86353285. Pianka, E. R. (1974). "Niche overlap and diffuse competition". Proceedings of the National Academy of Sciences. 71 (5):...
under diffuse ambient light. When suitably lit, the interference pattern diffracts the light into an accurate reproduction of the original light field, and...
important fields are influenced by physics (e.g., the fields of econophysics and sociophysics). Physicists use the scientific method to test the validity...
characterize lesions of the liver, pancreas, and bile ducts. Focal or diffuse disorders of the liver may be evaluated using diffusion-weighted, opposed-phase...
of kilometres into outer space. Coronal light is typically obscured by diffuse sky radiation and glare from the solar disk, but can be easily seen by...