William D. Duncan,Roderick A. Hyde,Muriel Y. Ishikawa,Jordin T. Kare,Thomas A. Weaver,Lowell L. Wood, JR.
申请号：
US13686444
公开号：
US20140144390A1
申请日:
2012.11.27
申请国别(地区):
US
年份:
2014
代理人:
摘要：
A system for directing a bird away from equipment includes an emitter configured to transmit a beam of audio-modulated ultrasonic sound. The beam of audio-modulated ultrasonic sound is configured to frequency down-convert in the atmosphere to produce a specified audible sound for a bird at a selected distance away from the emitter.
