At the top of the show, Ray is lost in his memory and experiences a sort of "emotional bus crash." Here, three speakers move the source of the sound across the stage; landing at Ray just before the crash.
White noise symbolized first Ray's persistent rage, then his clouded mind. Sudden shifts from the upper to lower speakers brought the sound closer to the audience; creating a fuller, more immediate feeling.
During pre-show and intermission, I played commercials (emphasizing the consumerist theme of the show) one by one, each from a different speaker. During preshow in particular, this acclimated the audience to having speakers so close to them so that this wouldn't distract during the performance.