WHAT IS SOUND?

Sound in Physics

Sound is defined as the vibration that results in an easy to hear mechanical
wave that proceeds on pressure and displacement using medium as air or
water to propagate itself.



Sound in Psychology

Sound is what brain recognizes as a result of the auditory sensation evoked
by the reception of propagated waves, by the hearing senses of living
organisms.

ORIGINATING SOUND

Sound source?

Sound wave?

Propagating medium?

Pressure, Velocity and Displacement

SPEED OF SOUND

Temperature of the medium affects the relationship between density and
pressure, which increases the speed of sound in that medium. If the
medium itself is in motion (wind), it further speeds up.

Viscosity of the medium affects the motion of sound waves through the
medium and thus reduces the speed of sound.

Sound cannot be propagated in Vacuum.