You're probably among the millions who have experienced it: driving in a car, listening to the radio, and suddenly this song comes on. It is not just any song--this was your favorite song when you were a teenager. As the first few notes strike up, you're transported back in time. Everything is so vivid, and your mind wanders to parties, first kisses and sweaty palms. It's as if time stands still and you suddenly realize that for the entire duration of the song, you haven't seen a single thing on the road.

There's no doubt about it, sound is immensely powerful. And yet 83% of all the advertising communication we're exposed to daily (bearing in mind that we will see two million TV commercials in a single lifetime) focuses, almost exclusively, on the sense of sight. That leaves just 17% for the remaining four senses. Think about how much we rely on sound. It confirms a connection when dialing or texting on cell phones and alerts us to emergencies. When the sound was removed from slot machines in Las Vegas, revenue fell by 24%. Experiments undertaken in restaurants show that when slow music (slower than the rhythm of a heartbeat) is played, we eat slower--and we eat more!