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Method for electronically beam forming acoustical signals and acoustical sensor apparatus

  • US 6,603,861 B1
  • Filed: 10/07/1998
  • Issued: 08/05/2003
  • Est. Priority Date: 08/20/1997
  • Status: Expired due to Term
First Claim
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1. A method for electronically forming a predetermined characteristic of amplification in dependency of direction (θ

  • ) from which acoustical signals (IN) are received at at least two spaced apart acoustical/electrical transducers (1, 2), comprising, at least within a predetermined frequency band, the steps of;

    repetitively determining from signals (S1, S2) dependent from said acoustical signals a respective mutual delay signal (dtω

    ) according to reception delay at said at least two transducers;

    subjecting a signal dependent from the output signal (S1) of at least one (1) of said at least two transducers (1, 2) to filtering with a filtering transfer characteristic (14);

    controlling said filtering transfer characteristic (14) in dependency of said mutual delay signal (A12);

    exploiting a signal dependent from the output signal of said filtering (14) as electrical reception signal (Sr).

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