FIELD: agriculture. SUBSTANCE: rodent scare-away device comprises setting generator 1, binary counter 2, oscillating frequency generator 3, switch circuit 4, frequency divider 5, saw-tooth voltage generator 6, voltage-controlled generator 7, power amplifier 8, loudspeaker 9. The device generates a signal unbearable to rodents. EFFECT: higher efficiency. 2 cl, 2 dwg
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Authors
Dates
1995-08-27—Published
1992-12-21—Filed