A major contribution has been the selection of Iris Lettieri, a former actress and media reporter, as the flight arrival and departure announcer. She has perfected a vocal style that has eliminated the annoyance many find listening to terminal announcements. Her style enriches the sound of a busy terminal building. Though we can't orchestrate the natural world, we can decide how to improve our own human sound environments as exemplified by the Rio airport terminal experience. We have the ability to give emphases to those sounds that we believe are important to our sense of a quality environment.
Orchestration is an act which focuses on the combining or arranging of sound in a harmonious manner.
This means that we may bring sounds to the foreground which have a particular quality, such as the fog horns in the bay at San Francisco. Or we may want to reduce the dominance of one or more sounds, such as the effort to remove street musicians in Portland, Oregon. As modern society creates an increasingly noisy environment, architects try to compensate by raising the sound level of air condition systems to mask noise from outside a building. Developers plant trees or build fences along freeways to block unwanted sound. Thousands walk or jog around city streets masking out the acoustical pollution with audio headsets.