Sound is caused by the simple but rapid mechanical vibrations of various elastic bodies . These when moved or struck so as to vibrate, communicate the same kind of vibrations to the auditory nerve of the ear, and are then appreciated by the mind.
Does sound require someone to hear it?
All you need is a source of vibration that you can control. A musical instrument can be as simple as a tin-can drum or as complex as a piano. ... But by definition, vibrations don't become sound until they are detected. The tree creates vibrations, but you can't really call those vibrations “sound” unless they are heard .
Does sound happen if nothing is present to hear it?
We can define sound as our perception of air vibrations. Therefore, sound does not exist if we do not hear it . When a tree falls, the motion disturbs the air and sends off air waves.
Can sound travel through empty space?
Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space , where there are no atoms or molecules to vibrate.
Does light make sound?
Light does not, except very indirectly, make sound . The two things are about as different as can be, despite both bearing similar tags of “vibration” and “wave” and “energy carrier”. High power laser radiation can cause electric breakdown in the air, the breakdown produces sound.
What are the 3 types of sound?
Sound waves fall into three categories: longitudinal waves, mechanical waves, and pressure waves .
Why do vibrations make sound?
Sound is a type of energy made by vibrations. When an object vibrates, it causes movement in surrounding air molecules . These molecules bump into the molecules close to them, causing them to vibrate as well. ... This “chain reaction” movement, called sound waves, keeps going until the molecules run out of energy.
Why it is that sound Cannot travel in vacuum?
Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate .
Will sound travel in a vacuum?
IN SPACE, no one can hear you scream. Sound waves are travelling vibrations of particles in media such as air, water or metal. ... So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.
Why is there no noise in space?
No, you cannot hear any sounds in near-empty regions of space. Sound travels through the vibration of atoms and molecules in a medium (such as air or water). In space, where there is no air, sound has no way to travel .
Which comes first sound or light?
The speed of sound through air is about 340 meters per second. It's faster through water, and it's even faster through steel. Light will travel through a vacuum at 300 million meters per second. ... No information can propagate faster than the speed of light.
Which is faster light or sound?
The speed of light as it travels through air and space is much faster than that of sound; it travels at 300 million meters per second or 273,400 miles per hour. ... Speed of light in a vacuum and air = 300 million m/s or 273,400 mph.
What is the relationship between light and sound?
Sound travels in waves and exists only within a medium. Light also travels in a wavelike manner but light has electric and magnetic properties and accordingly it is an electromagnetic (EM) wave. Sound travels at 343 m/s in air and light travels through all mediums at almost 300,000,000 m/s.
What are the 2 types of sound?
There are two basic types of wave, transverse and longitudinal , differentiated by the way in which the wave is propagated.
What are the five sources of sound?
Acoustic instruments, Electrical instruments, Living beings like animals and birds using their vocal cords, Man-made sources like machines, any vibration caused by wind are five sources of sound.
