Y
Yoshiro Kumamoto
Researcher at University of Electro-Communications
Publications - 11
Citations - 329
Yoshiro Kumamoto is an academic researcher from University of Electro-Communications. The author has contributed to research in topics: Acoustic streaming & Nonlinear acoustics. The author has an hindex of 8, co-authored 11 publications receiving 305 citations.
Papers
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Acoustic streaming induced in focused Gaussian beams
TL;DR: In this article, Axisymmetric flow equations for a viscous incompressible fluid are transformed into the vorticity transport and Poisson's equations via a finite difference method imposing appropriate initial and boundary conditions.
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Parametric loudspeaker—characteristics of acoustic field and suitable modulation of carrier ultrasound
TL;DR: In this article, a numerical analysis method available for high sound pressure levels, where the nonlinear interactions of ultrasound become greatly active, can be used successfully to theoretically design the parametric loudspeaker.
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Harmonic generation in finite amplitude sound beams from a rectangular aperture source
TL;DR: Theoretical analysis and some experiments are performed on nonlinearly generated harmonic components in bounded sound beams emitted from a rectangular aperture source as mentioned in this paper, which takes account of nonlinearity, dissipation, and diffraction effects in the beams, numerically solved by means of the alternating direction implicit difference method.
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Nonlinearly generated spectral components in the nearfield of a directive sound source
TL;DR: In this paper, a directive ultrasound source with 1410 small PZT bimorph transducers, whose resonance frequency is 28 kHz, is discussed theoretically and experimentally, and sound pressures of the fundamental, second, and third harmonics are measured and compared with the numerical results using a method of Aanonsen et al.
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Time evolution of acoustic streaming from a planar ultrasound source
TL;DR: Kamakura et al. as mentioned in this paper examined Eckart-type acoustic streaming induced in confined sound beams from a piston source in water theoretically and experimentally using a 5MHz planar transducer with a 9.5mm radius aperture.