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Methoden zur Untersuchung der Schwingungskavitation in Flüssigkeiten mit Ultraschall

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A high intensity sonic field is generated in water by means of a quartz crystal (300; 575; 800 kc/s). Cavitation then sets in at the nucleus bubbles, which oscillate non-linearly. Their sound radiation causes noise. The sound pressure is measured by a hydrophone. The critical point at which cavitation then commences is determinated in the following ways. 1. from the discontinuity in the curve of microphone voltage (transmitting frequency) against transmitter voltage, 2. from the observed formation of bubbles, 3. from the commencement of a high-frequency noise, which is analysed from 60 to 1100 kc/s, 4. from the commencement of low frequency noise, in which case the hydrophone can be at the same time employed for measuring the radiation pressure for amplitude-modulated ultra-sonic radiation, 5. from the formation of peaks of high pressure which can be visually demonstrated using a wide-band amplifier and an oscillograph. The important influence of the size of the nuclei on the tensile strength and on the onset of cavitation is experimentally determined.
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Document Type: Research Article

Publication date: January 1, 1952

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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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