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    • 4. 发明公开
    • Periodically variable multitone generator
    • Periodisch wechselnder Mehrfachtonerzeuger。
    • EP0338998A2
    • 1989-10-25
    • EP89830131.2
    • 1989-03-23
    • Catinella, Vito Antonio
    • Catinella, Vito Antonio
    • G10K9/13
    • B06B1/0284
    • The invention has the aim to personalize better the sounds of a siren or of any other emitter used as an anti-thief device.
      Personalization is achieved by means of emissions of pure multi-tonal sounds which are periodically transformed by varying the frequency.
      Other aims of the invention are the elimination of problems due to auditive adaptation and the difficulty of distin­guishing the origin of the sounds.
      The enclosed circuit diagram represents an example of the realization of such an emitter; the diagram also permits the visualization of the sounds by means of an optic tran­sducer.
    • 本发明的目的是更好地个性化警报器或用作防窃贼装置的任何其他发射器的声音。 通过发射通过改变频率周期性地变换的纯多音调声音实现个性化。 本发明的其他目的是消除由于听觉适应引起的问题和区分声音起源的难点。 封闭的电路图表示这种发射器的实现的示例; 该图还允许通过光学传感器对声音进行可视化。