According to research to be presented this week at the annual meeting of the acoustical society of america in san diego , mobile phones also cut off the highest-pitched ranges of our voices .
据这星期在圣地亚哥美国声学协会的年度会议调查,证实了这个结论:手机屏蔽了声音中的高声调波段。
One of the more promising approaches uses an array of lightweight acoustical probes coupled to a signal-processor that filters out wind noise to listen for and locate other aircraft in the sky , and to transmit avoidance instructions immediately to the drone 's operator on the ground .