Results 121 to 130 of about 117,140 (175)
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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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Acoustic diaphragm with polyurethane elastomer coating
The Journal of the Acoustical Society of America, 1979An acoustic diaphragm has a substrate of either a hard resin film or cloth of an organic material, and at least one side of the substrate is laid with a polyurethane elastomer layer. In the case of a cloth substrate, the cloth is optionally metallized by evaporation deposition of Al or Ti and/or impregnated with a thermosetting resin.
Hirotoshi Niguchi, Mitsuru Ieki
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Flame retardant diaphragm for acoustic transducers
The Journal of the Acoustical Society of America, 1986A flame retardant diaphragm for speakers, etc. comprises an admixture of natural fibers and inorganic fibers. The admixture is impregnated with a thermosetting resin and an organic bromine compound, and heat-treated under pressure. The organic bromine compound acts as a flame retarder.
Kazuo Tsuchiya +2 more
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2017
Vibrating diaphragms have become an important component of acoustics technology, with nearly all commercial microphones and speakers of the past half a century relying on diaphragm vibration. Although few select materials (such as nickel and boPET) are predominantly used because of their favorable properties such as small mass density and large tensile
Abramović, Denis, Demoli, Nazif
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Vibrating diaphragms have become an important component of acoustics technology, with nearly all commercial microphones and speakers of the past half a century relying on diaphragm vibration. Although few select materials (such as nickel and boPET) are predominantly used because of their favorable properties such as small mass density and large tensile
Abramović, Denis, Demoli, Nazif
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Method for producing a diaphragm for acoustic appliances
The Journal of the Acoustical Society of America, 1990In production of a diaphragm for acoustic appliances, a thin metal layer is formed on a substrate by means of vapor phase development so that the density of the product should be high enough for generating high sound pressure even in the high frequency range.
Kunio Suzuki, Toshiharu Hoshi
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Acoustical Impedance of Thin Diaphragms
The Journal of the Acoustical Society of America, 1967Differential equation describing the deflection η of a thin circular diaphragm, loaded with a complex specific acoustical impedance per unit area is solved. Then the total acoustical impedance Za of the diaphragm defined by 1/Za = jω∫∫ηdS/p is calculated, where p is the acoustic pressure, and dS element of area.
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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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Diaphragm for acoustic instruments and method of manufacturing the same
The Journal of the Acoustical Society of America, 1983A honeycomb shaped diaphragm for use in acoustic instruments such as speakers is manufactured by kneading a mixture of flaky graphite powder and thermoplastic resin, preferably polyvinyl chloride, rolling the mixture into a plate, forming honeycomb recesses in the plate, and mating two recessed plates with each other so that the corresponding recesses ...
Isao Yamamuro, Tsunehiro Tsukagoshi
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Process of making an acoustic carbon diaphragm
The Journal of the Acoustical Society of America, 1991A process for producing a diaphragm for an acoustic device of carbonaceous materials which has the steps of mixing and kneading an organic mixture composition containing one or more or mixtures of a monomer, prepolymer and low polymer of relatively polymerizable thermosetting resin of a substance exhibinting high carbon residual yield after calcining ...
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Experimental validation of diaphragms for acoustic micro-transducers
2015 Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS (DTIP), 2015The electro-mechanical characterization of MEMS diaphragms for acoustic applications is introduced in this paper. The samples under test are fabricated with the 0.35 AMS CMOS process with front-side surface etching post-process. The goals of the experimental activities are to verify the performances and repeatability of fabrication process and to ...
Esteves, J. +5 more
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