A very wide bandwidth constant beamwidth acoustical end-fire line array without side lobes

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A simple technique for maintaining the beamwidth of a transducer constant over a very wide frequency range (over N octaves) is described. An acoustical end-fire line array of five weighted sensors is used to produce a radiation pattern, without side lobes, at frequency F1. A half-scale model is implemented to give the same directivity pattern at frequency 2F1. Two compensation filters, whose frequency responses are derived by imposing the constant beamwidth constraints, are used in the respective array outputs, to produce a constant beamwidth, without side lobes, over the octave. The design process is repeated N times, to obtain an acoustical array without side lobes and with constant beam shape over N octaves.

References (8)

  • J.C. Morris

    Broadband constant beam-width transducers

    Journal of Sound and Vibration

    (1964)
  • D.G. Tucker

    Arrays with constant beamwidth over a wide frequency range

    Nature

    (1957)
  • R.P. Smith

    Constant beamwidth receiving arrays for broad band sonar systems

    Acustica

    (1970)
  • P.H. Rogers et al.

    New approach to a constant beamwidth transducer

    Journal of the Acoustical Society of America

    (1978)
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