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Transient Radiation Field from an Elastic Circular Plate Excited by a Sound Pulse

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Fairly accurate far-field transient radiation fields from an elastic clamped circular plate are derived when the plate is excited by a normal incident plane sound pulse. By assuming the simple expression for the radiation impedance of the vibrating plate, the impulse response of this pressure field is obtained. By using the convolution integral, the pressure field of the circular plate subjected to the triangular sound pulse is examined and is compared with the exact pressure field. The process of the transient sound radiation is discussed in comparison with one due to the piston-like vibration of the plate, especially in view of the first shock of the radiated waveform.


Für eine elastisch eingespannte kreisförmige Scheibe, die durch einen normal einfallenden ebenen Schallimpuls angeregt wird, kann das transiente Schwingungsfeld im Fernfeld ziemlich genau hergeleitet werden. Unter der Annahme, daß der einfache Ausdruck für die Strahlungsimpedanz der schwingenden Platte gültig ist, erhält man die Impulsantwort des Systems. Mit Hilfe des Faltungssatzes wird das Druckfeld der Kreisscheibe, welches bei einer Anregung mit einem Dreieckimpuls entsteht, untersucht und mit dem exakten Feld verglichen. Der Vorgang der transienten Schallschwingung wird im Vergleich zur kolbenartigen Schwingung der Platte diskutiert, insbesondere im Hinblick auf die erste Wellenfront.

Document Type: Research Article

Publication date: November 1, 1980

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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