how can we define sound? does traveling light also produces sound?

Answer 1

Sound is a disturbance of mechanical energy that propagates through matter as a wave. Sound is characterized by the properties of sound waves, which are frequency, wavelength, period, amplitude and velocity or speed.

By sound, we commonly mean the vibrations that travel through air and can be heard by humans. However, scientists and engineers use a wider definition of sound that includes low and high frequency vibrations in air that cannot be heard by humans, and vibrations that travel through all forms of matter, gases, liquids and solids. The matter that supports the sound is called the medium. Sound propagates as waves of alternating pressure, causing local regions of compression and rarefaction. Particles in the medium are displaced by the wave and oscillate. The scientific study of sound is called acoustics.

Noise and sound often mean the same thing; but noise is often used to refer to an unwanted sound. In science and engineering, noise is an undesirable component that obscures a signal

Sound is perceived through the sense of hearing. Humans and many animals use their ears to hear sound, but loud sounds and low-frequency sounds can be perceived by other parts of the body through the sense of touch. Sounds are used in several ways, notably for communication through speech or, for example, music. Sound can also be used to acquire information about properties of the surrounding environment such as spatial characteristics and presence of other animals or objects. For example, bats use echolocation, ships and submarines use sonar, and humans can determine spatial information by the way in which they perceive sounds.

The speed at which sound travels depends on the medium through which the waves are passing, and is often quoted as a fundamental property of the material. In general, the speed of sound is proportional to the square root of the ratio of the stiffness of the medium and its density. Those physical properties and the speed of sound change with ambient conditions. For example, the speed of sound in air and other gases depends on temperature. In air, the speed of sound is approximately 345 ms-1, in water 1500 ms-1 and in a bar of steel 5000 ms-1.

Answer 2

Sound waves are vibrations of molecules or atoms. The closer the molecules or atoms are together the better the sound travels. Each molecule hits its neighbor and passes the sound along. In a vacuum, there are no molescules to be vibrated; so no sound. Light is energy and does not need a medium (material) to travel through.

Answer 3

the waves produced by any vibrating body in the audible range i.e. 20 Hz to 20,000 Hz produces sound.
No the travelling light can not produce sound because they are electro magnetic( transverse )waves where sound is longitudinal waves.

Answer 4

Sound is an energy..........

Depends on the frequecy that you can hear.

A light source may produce 50 cyl hum or 60 Cyl hum some time.

It come from the conponat that resonate.

Answer 5

Vibration transmitted by air or some other material medium in the form of alternate compression and rarefaction of the medium..
Velocity of sound in air 332m\sec