Do-it-yourself rat trap

Rat Glue Trap

These are sophisticated indoor ultrasonic devices designed for rat eviction. The device consists of a Master and a Terminal unit. The units emit powerful ultra-sonic waves at 200 decibels whose frequency rapidly varies between 25kHz to 65kHz with time. Their frequency-varying sequences are precisely synchronized between themselves and the units are carefully positioned from one another so that the two ultrasonic beams integrate into a very complex waveform. These complicated waveforms are basically acoustic noises in Ultra High Frequency range. Humans are unaware of noises at such high frequencies. The enclosed room is now echoing with UHF noises. Rats, whose hearing range extended far beyond humans' limits and deep into the UHF bandwidth, will find the noise level in the entire enclosed space devastating. However, UHF waves cannot penetrate through thick objects or concrete walls. Hence, the Master unit also emit electro-magnetic pulses (Click to request for literature on the application of pulsating electro-magnetic fields to repel rats from living premises.) which can penetrate into areas where UHF noises cannot. Rats sheltered in areas shielded from UHF noises will be consistently harassed by the pulsating electro-magnetic field. Nonetheless, rats have better tolerance towards pulsating electro-magnetic fields than to UHF noises and it may take days for this method to take effect. Under the overwhelming harassment by UHF noises and electro-magnetic pulses, rats inhabiting within 20, 000 cubic feet of the ultrasonic pest repeller will have to abandon the premises.

Traditional Rat Trap

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