Results 81 to 90 of about 582 (127)
Optimization Design of CMUT Sensors with Broadband and High Sensitivity Characteristics Based on the Genetic Algorithm. [PDF]
Sensors (Basel)Zhang S +5 more
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A Novel Nondestructive Testing Probe Using AlN-Based Piezoelectric Micromachined Ultrasonic Transducers (PMUTs). [PDF]
Micromachines (Basel)Yin J, Zhou Z, Lou L.
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Flame-retarded acoustic diaphragm
The Journal of the Acoustical Society of America, 1985A flame-retarded speaker diaphragm is prepared by making a cone from cellulose fibers, impregnating the cellulosic cone with a solution of a trimethylol melamine monomer, an organic phosphorus- and nitrogen-containing compound, and a trialkyl amine catalyst in an alcohol solvent, and heating the impregnated cone until the solvent is removed and the ...
Katsuyoshi Kumagai +2 more
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Acoustic transducer with honeycomb diaphragm
The Journal of the Acoustical Society of America, 1985An acoustic transducer having a honeycomb-type diaphragm material, which transducer comprises a piezoelectric element and a driving element supported within a housing frame and acoustically attached by a coupling means to a honeycomb-type diaphragm, flat sheet material having a high stiffness-to-weight ratio, to provide an acoustic transducer having an
Louis Melillo +2 more
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Diaphragm material for acoustical transducer
The Journal of the Acoustical Society of America, 1987ABSTRACT OF THE DISCLOSURE An improved diaphragm material for use with an acoustical transducer, such as a moving-coil electrodynamic loudspeaker and a loud speaker containing such diaphragm, which diaphragm comprises a formed, self-supporting, woven carbon fiber cloth material optionally having a thin air sealing plastic coating thereon, the diaphragm
Iwao Sashida +2 more
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Diaphragm, flat-type acoustic transducer, and flat-type diaphragm
The Journal of the Acoustical Society of America, 2006A first conductor and a second conductor are provided at a diaphragm. The first and second conductors intersect magnetic force lines between north poles and south poles of permanent magnets M which are adjacent to one another. When electricity passes through the conductors, a direction in which a force from the magnetic field acts on the current is ...
Hiromi Sotme, Toshiiku Miyazaki
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Electro-acoustic transducer with two diaphragms
The Journal of the Acoustical Society of America, 2006The present invention relates to an electro-acoustic transducer suitable for applications within mobile communication equipment and hearing aids. The transducer comprises two diaphragms positioned on opposite sides of a magnetic circuit having two magnetic gaps.
Aart Zeger van Halteren, Leif Johannsen
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Parylene-diaphragm piezoelectric acoustic transducers
Proceedings IEEE Thirteenth Annual International Conference on Micro Electro Mechanical Systems (Cat. No.00CH36308), 2002This paper reports the fabrication of piezoelectric acoustic transducers built on a 1.5 /spl mu/m thick parylene (both flat 5,000/spl times/5,000 /spl mu/m/sup 2/ square and dome-shaped 2,000 /spl mu/m-radius diaphragm with circular clamped boundary on a silicon substrate) with electrodes and piezoelectric ZnO film.
Eun Sok Kim, Cheol-Hyun Han
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Acoustic audio transducer with aerogel diaphragm
The Journal of the Acoustical Society of America, 1999This invention describes an acoustic transducer, either speaker or microphone, that uses an aerogel diaphragm or an aerogel acoustic interface made of magnetic aerogel or conductive aerogel or both. In the case of a speaker, the aerogel diaphragm is directly driven either by electromagnetic or electrostatic means to reproduce high fidelity sound.
Lawrence C. Menasco, Jeffrey W. Menasco
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