The auditory nerve receives signals from the nerve cells and transmits them to the auditory center in the brain. In the cochlea–a snail shell-like, fluid-filled chamber–the sound waves stimulate tiny hairs that are connected to the auditory nerve or the hearing-nerve. Sound vibrations then move through an oval opening, called the cochlea. The inner ears, eardrums and tiny bones inside the ear, called the hammer, anvil and stirrup all begin to vibrate as the sound waves start to enter the inner ear. The human ear that attaches to both sides of the head acting as a funnel to catch even the tiniest sound around.
Our ears serve as a bridge for sound waves to pass. The air columns inside the instrument are then made shorter or longer which produces different sounds. The keys produce different size openings in the instrument. In wind instruments, there is a reed – a thin piece of wood inside the mouthpiece, which vibrates when air travels over it. Strings also produce different sounds depending on how thick they are. Shortening a string makes it sound higher, while lengthening a string can produce a lower sound. This pressure changes the string’s length, causing them to vibrate at different frequencies and make different sounds. Stringed instruments are played when fingers or a bar are pressed down on the strings. If you fear music, then you have Melophobia. 
If you fear noise, then you have Acousticophobia. Noises are formed by irregular and disordered sound vibrations. Music can be described as a beautiful or expressive arrangement of sounds. Musical sounds are composed of regular and uniform sound vibrations. Sometimes you can feel the vibrations thunder makes while you are actually hearing it. Sound waves can even be felt by different parts of the body. The ear is not the only detector people and animals have. Sound waves are also known as pressure waves because the wave moves the particles along its passa. If the human ear is within the range of the vibrations, a sound can be heard. And then, when these particles move slowly, a low volume of sound is produced. When these particles move fast, a high volume of sound is formed. This continued bumping cause a sound wave. The air particles then bumps into each other and then bump into others. When any object vibrates, it causes the particles to move in the air. Sound is energy that is made by vibrations. See the fact file below for more information about sound. These vibrations make air molecules move. For instance, when a drum or a cymbal is struck, the object vibrates. All sounds are made by vibrations of molecules through which the sound travels. Sound is the term to describe what is heard when sound waves pass through a medium to the ear. Download includes the following worksheets:.
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