Now Hear This

摘要

Elwood (woody) norris hangs out of a third-floor window of an office building in New York. In his hands is his latest invention, the HyperSonic Sound emitter. Seventy feet away, on the opposite side of Fifth Avenue, two FORBES staffers are told to stand and listen. At first we hear only the usual sounds of traffic, then, suddenly, the taxi honks are joined by bird shrieks and gurgling streams of a rain forest. The jungle sounds are so loud that, were they from a conventional loudspeaker, hundreds of pedestrians would be able to hear them. Remarkably, only we two can.