All sounds have one thing in common. This being that the vibrations of an object makes every sound. When an object vibrates, it causes the air around it to vibrate. The vibrations in the air travel out from all directions of the object. They then reach our ears, and the brain reads them as sounds. Many sounds we hear travel through the air; however, they can also travel through solid objects like the earth.

Our voice is made in the larynx, which is a part of the throat. Two small pieces of tissue are spread across the larynx. These pieces, called vocal chords, make the opening smaller. Air from he lungs quickly passes trough the tightened chords, causing them to vibrate. The vibrations make the sound of the voice. The tighter the chords are, the faster the vibrations and the higher the resulting sound.

If a rock is thrown onto a still pond, several waves travel o

The loudness of a sound is how strong the sound is to us when it hits our ears. At a certain frequency, the more intense the sound is, he louder it seems. Equally intense sounds of different frequencies are not equally loud.

Sound makes life more interesting. Without it things would be dull and boring. Because of sound we are able to verbally communicate with others, show emotions, and express our beliefs. Sound is a very important factor in the lives of many.

The echo is produced when the sound waves are reflected from the walls of your ears. If sound travels at about the same speed in both materials with the same density, little sound will be reflected. Instead, most of the sound will be transmitted into the new medium. If the speed differs greatly in the two mediums and their densities are greatly different, most of the sound will be reflected.

When sound waves leave one medium and enter another in which the speed of sound differs, the direction of the waves is altered. This change in direction results from a change in the speed of waves called refraction. Sound waves can also be refracted if the speed of the sound changes according to their position in a medium. The waves bend toward the region of slower speed. Sound travels farther when the air is coo

Some common words found in the essay are:
Da Vinci, Sound Sound, sound waves, sound travels, object vibrates, speed sound, rapidly object vibrates, object vibrates frequency, vibrates frequency frequency, air travel, vibrate vibrations, frequency frequency, intense sound, repeated force, sound wave,
Approximate Word count = 856
Approximate Pages = 3 (250 words per page double spaced)