Aversive responses of dogs to ultrasonic, sonic and flashing light units

摘要: Abstract Two experiments were conducted to test the ability of various ultrasonic devices repel dogs at a distance 1 m. In Experiment 1, three (Unit commercial unit with bursts from 14 42 kHz and overall sound pressure 60 dB; Unit 2 had 7–15, 25–30, 26–35 30–40 kHz, 75 3 covered wide band 17–45 65 dB), an instrument which gave off flash light per second pocket alarm (compressed air) tested on 15 dogs. The divided into groups, small (22–32 cm withers), medium (46–57 cm) large (66–87 cm), within these groups there long- short-haired types breed types. No device repelled all any specific frequency or level tested, although aversive behaviour was noted in several Units 3, alarm. months after first one, when equipment modified. Fourteen similar groupings used. instruments two driving Hi-Fi tweeters produced sweeps 17 kHz-5 kHz-55 output 120 sweep frequencies but unknown variance 20–35 averaged 118 4 same as dB). immediate effect 13 dogs; 9 reacted aversively, apprehension pricked their ears.