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Blinking is something we do automatically, without . We blink 15–20 times a minute. There are several reasons why we . One is to stop our eyes from dry. This helps our vision. Another reason is to our eyes from dust or sudden insect attacks. Scientists in Canada think they have another function of blinking. The researchers are from Concordia University in Montreal. They found that we blink less when we are to someone speak. This more when there is background noise. Lead researcher Penelope Coupal said blinking less our brain has a little more energy. This allows us to on what another person is .

The research team two experiments on 49 participants. All of the test participants listened to sentences read aloud. In one experiment, there no background noise. In the other test, there was background noise, which it harder for the people to the sentences. The scientists said that people in the test with background noise a lot less. When the background noise increased, blink rates even further. Study co-author Dr Mickael Deroche said we automatically blink less "when important information is ". Ms Coupal agreed. She said: "We don’t just randomly. In fact, we blink systematically less when important information is ."