Fraunhofer-Forschungsgruppe Hydroakustik FHAK

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  • Publication
    A novel tube device for measuring hydroacoustic properties of homogeneous and layered materials
    ( 1991)
    Brebeck, D.
    Paper describes a tube facility for investigations in underwater acoustic. The purpose is the measurement of physical parameters of materials. The device can be driven in the pulse mode and in the standing wave mode. The pulse mode delivers the echo reduction of a test material at normal incidence. The standing wave mode is used to measure and calculate the input impedance of the material in magnitude and phase.
  • Publication
    Recent development in measuring material parameters by a tube facility
    ( 1991)
    Brebeck, D.
    Paper describes a tube facility for investigations in underwater acoustics. The purpose is the measurement of physical parameters of materials. The device can be driven in the pulse mode and in the standing wave mode. The pulse mode delivers the echo reduction of test material at normal incidence. The standing wave mode is used to measure and calculate the input impedance of the material in magnitude and phase.