| 摘要 |
It consists of a circuit which, via an ultrasound transducer, converts a signal obtained by means of an oscillator and modified by a sequencer, which emits in a variable manner, said signal being variable in terms of frequency and intensity, in such a manner that the insects and rodents cannot become accustomed to its sound, which is inaudible to humans. Applicable to the elimination of rodents and insects. <IMAGE>
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