In an experiment that tested how well people can hear a signal while being blasted with background noise, subjects listening with both ears were able to detect much softer sounds than subjects listening with only one ear.

• 曾经有人测试过人类在吵杂的背景噪音中听取讯号的能力，结果发现，以双耳听音的人比单耳听音的人，能够听取到更细微的声音。