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why do we hear the ocean in a shell

Have you ever visited the? Maybe you live along a
where you get to see the all the time. For most others, though, seeing the means taking a trip в sometimes a long trip! в to visit the. If you've ever walked along a, you've probably searched for. They're not always easy to find, though. If you can't find any big seashells, you may decide to check out the selection of shells at a local shop. One thing most children do upon first picking up a large is to hold it up to their ears to listen for the sounds of the inside the shell. If you've ever tried this, you know that it works. No matter how far you are from the, it seems like you can hear the soothing sounds of waves lapping up onto the beach when you hold a shell to your ear. Obviously, the isn't inside the shell.

So what exactly is it that you're hearing? If not the, what in the world is it? One popular that many people believe is that, when you hold a shell up to your ear, what you're really hearing is the of the blood pumping through the blood vessels in your head. It sounds, but scientists have proved that the of pumping blood is not what you're hearing. Others believe what you hear is the sound of air flowing through the shell. Scientists have disproved this theory, too, though. When tested in a room в where there's still air flowing в shells don't produce the same в " sound. So what IS that sound you hear? Scientists believe the most likely answer is that it's the of the noise in the air around you. They call this noise. The captures the noise, which then resonates inside the shell.

Depending upon the size and type of shell you listen to, different of sound will be echoed back to your ear. This leads to different shells making different в " sounds. The best shells are large, shells. Would you believe you don't even need a shell to hear the в "? You can produce the same effect with an empty cup or simply by cupping your hand over your ear. You may want to try this in a noisy area. The more noise there is around you, the louder the effect will be. There is a popular that if one holds a specifically, most often, a shellto one's, one can hear the sound of the. The rushing sound that one hears is in fact the noise of the surrounding environment, within the cavity of the shell. The same effect can be produced with any, such as an empty cup or even by simply cupping one's hand over one's ear.

The similarity of the noise produced by the resonator to that of the oceans is due to the resemblance between movements and airflow. The resonator is simply some of the in the environment, including air flowing within the resonator and sound originating within the itself, more than others. The human picks up sounds made by the as well, including the sounds of blood flowing and acting. These sounds are normally discarded by the ; however, they become more obvious when louder external are filtered out. This occurs with seashells, cups, or hands held over one's ears, and also with, whose cups form a seal around the ear, raising the impedance to external sounds.

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