Results 11 to 20 of about 6,542 (145)
Modeling and Compensation of Nonlinear Distortion in Horn Loudspeakers [PDF]
, 1994 Horn loaded compression drivers are widely used in the area where high sound pressure levels together with good directivity characteristics are needed. Major disadvantage of this kind of drivers is the considerable amount of nonlinear distortion.
Berkhoff, Arthur P. +3 more
core +9 more sources
Miniature photonic-crystal hydrophone optimized for ocean acoustics
, 2010 This work reports on an optical hydrophone that is insensitive to hydrostatic pressure, yet capable of measuring acoustic pressures as low as the background noise in the ocean in a frequency range of 1 Hz to 100 kHz.
Gordon S. Kino +7 more
core +1 more source
A Grating Interferometric Acoustic Sensor Based on a Flexible Polymer Diaphragm
Sensors, 2023 This study presents a grating interferometric acoustic sensor based on a flexible polymer diaphragm. A flexible-diaphragm acoustic sensor based on grating interferometry (GI) is proposed through design, fabrication and experimental demonstration. A gold-coated polyethylene terephthalate diaphragm was used for the sensor prototype.
Linsen Xiong, Zhi-mei Qi
openaire +3 more sources
Constant-pressure sound waves in non-Hermitian disordered media
, 2018 When waves impinge on a disordered material they are back-scattered and form a highly complex interference pattern. Suppressing any such distortions in the free propagation of a wave is a challenging task with many applications in a number of different ...
Brandstötter, Andre +5 more
core +2 more sources
Multiphysics Modeling of a Synthetic Jet Actuator in Operation
ActuatorsActive flow control is a promising technology for reducing noise, emissions, and power consumption in various applications. To better understand the performance of synthetic jet actuators, a computational model that couples structural mechanics with ...
Matthew G. M. Butler +2 more
doaj +1 more source
Integrated 3D Sound Intensity Sensor with Four-Wire Particle Velocity Sensors [PDF]
, 2008 A new symmetrical four-wire sensor configuration has resulted in a fully integrated sound intensity sensor with significant lower noise floor and smaller size than its predecessors.
Van Honschoten, Joost +2 more
core +8 more sources
Fully integrated three dimensional sound intensity sensor [PDF]
, 2007 For the first time, a complete 3-dimensional sound intensity sensor – consisting of 4 particle velocity sensors and a pressure microphone – has been integrated on a single chip, providing the possibility to do nearly point measurements of acoustic ...
Elwenspoek, M. +3 more
core +3 more sources
Optical communications system Patent [PDF]
, 1969 Specifications and drawings for semipassive optical communication ...
Thomas, N. E.
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Low frequency acoustics in solid $^4$He at low temperature
, 2009 The elastic properties of hcp $^4$He samples have been investigated using low frequency (20 Hz to 20 kHz) high sensitivity sound transducers. In agreement with the findings of other workers, most samples studied grew very significantly stiffer at low ...
A. Penzev +4 more
core +1 more source
, 2007 Stetho·scope. Function: noun : an instrument used to detect and study sounds produced in the body that are conveyed to the ears of the listener through rubber tubing connected with a usually cupshaped piece placed upon the area to be examined.peer ...
Mangion, Kenneth
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