研究发现，人们在倾听他人讲话时会减少眨眼次数，以便大脑集中注意力处理重要信息。实验表明，在背景噪音环境下，人们眨眼更少，以专注于接收关键信息。
We all blink 15–20 times a minute. There are several reasons for this. One is so our eyes do not dry out. Another reason is to protect our eyes from dust. Scientists say they found a further reason. They say we blink less when we are listening to someone speak. Blinking less gives our brain more energy, so we can focus on listening.
The researchers did two experiments. In one, people listened to many sentences being read in a quiet room. In the other, there was background noise. The people in the room with background noise blinked a lot less. Another researcher explained that we blink less "when important information is coming".