The Super-Quiet $90M Perk for Private Jets

Mar. 3 (Bloomberg) --- The world's billionaires are paying up to soundproof their private airliner-size jets. Engineers are now able to bring in-flight cabin noise levels down so low that you can have a normal conversation standing up to 16 feet away from another person. We find out how they do it and why you have to be a billionaire to get this kind of peace and quiet. (Source: Bloomberg)