System for deterring underwater animals from an underwater region
作者： Jeremy Ross Nedwell
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摘要: In order to deter underwater animals from an region such as adjacent the entrance (12) offtake pipe or channel a river, sound and light are produced by producing units (14) in intermittently pulsed and/or at least one characteristic of is repetitively modulated. At some pulses occurrences feature modulation repetitions substantially synchronised with repetitions. For example, may be frequency modulated, when reaches its minimum. It believed that this synchronisation has synergistic effect.
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