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Because the brain process sound in two different ways, it will block out sounds that are unimportant and allow you to react to sounds that are. Here's a link that I found while asking the same question;
This is the passage from www.sciencedaily.com:
Using electrodes implanted directly on the human cortex, a Johns Hopkins University undergraduate has located the part of the brain that appears to process sounds while people sleep. This site, in the frontal lobe, may be part of a vigilance system that, for instance, rouses a mother when her baby cries but lets the woman sleep when a truck rumbles by.
http://www.sciencedaily.com/releases/1998/04/980430044534.htm
What else can I help you with?
What noise do you make in your sleep that is 5 letters?
bum
Is noise good for you?
White noise, in the form of a sound machine, helps many people sleep - by blocking out surrounding noise (in other rooms or apartments, or traffic noise).
Does white noise help you sleep?
White noise can help some people sleep by masking background sounds that may disrupt sleep. It can create a consistent and soothing sound environment that promotes relaxation and better sleep quality. However, the effectiveness of white noise in aiding sleep can vary from person to person.
Is white noise good for you?
White noise, in the form of a sound machine, helps many people sleep - by blocking out surrounding noise (in other rooms or apartments, or traffic noise).
What do people make that you can't see?
noise
Name something that dogs are always able to do that people can only do on a camping trip?
pee outside, sleep anywhere, catch food, make lots of noise
Do quinea pigs sleep?
i think they do. my guinea pigs make noise when im sleeping but sometimes they dont so yes they do sleep
Why are valley's so peaceful?
Becouse there is nobody alive to make noise & dead people cant make noise
How do people on the iss sleep?
People on the ISS sleep in sleeping bags that are secured to the wall, floor, or ceiling. They can sleep in any orientation, as there is no up or down in space. They also have eye masks and earplugs to help block out light and noise.
How many people die from noise in the cities?
It is difficult to determine the exact number of people who die from noise in cities as noise pollution can contribute to various health issues such as stress, sleep disturbances, and cardiovascular problems. However, it is estimated that millions of people worldwide are affected by noise-related health problems each year.
How many things can a bottle nose dolphin do while swimming?
it can sleep play eat make a funny clicking noise
What is the difference between a sleepover and a slumber party?
A slumber party is usually for a bunch of people and there is more noise and stuff and a sleep over is for one person to sleep at someone's house
