Abstract
Birds living in urban areas are known to cause conflicts with people, such as bird-dropping nuisance and garbage scavenging. Although sonic deterrents are often used as a general bird control technique, such techniques themselves may cause noise problems. In this study, we developed a bird deterrent system using directional speaker array for both bird damage control and noise prevention. The developed system was applied to an urban substation where carrion crows Corvus corone roosts in autumn, and its effectiveness against crows were tested. As a result of analyzing the crows landing on the substation, the number of crows was significantly reduced in locations where the sound pressure level of the auditory stimulus was 85 dB or higher.
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