Get Lecture 03 Sound Propagation - Isip

Sound is a sequence of waves of pressure which propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). During their propagation, waves can be reflected, refracted, or attentuated by the medium.

0:37 4:14 Propagation of Sound | Don't Memorise - YouTube YouTube Start of suggested clip End of suggested clip This process continues in the medium till the sound reaches R here. We see that we create someMoreThis process continues in the medium till the sound reaches R here. We see that we create some disturbance flowing through the medium. This is the way that sound travels through the medium.

SOUND PROPAGATION The TRANSMISSION of acoustic energy through a medium via a SOUND WAVE.

The correct answer is Acoustics. Acoustics is the study of the production and propagation of sound waves. Acoustics is the science concerned with the production, control, transmission, reception, and effects of sound. The term is derived from the Greek akoustos, meaning “heard.”

Sound needs a material medium for their propagation like solid, liquid or gas to travel because the molecules of solid, liquid and gases carry sound waves from one point to another. Sound cannot progress through the vacuum because the vacuum has no molecules which can vibrate and carry the sound waves.

e.g. when a tuning fork is struck against a rubber pad vibration created in the prongs can be noticed and brought near our ears we can sense the sound being produced, guitar strings produce sound when struck, etc. The traveling of sound from the sound source to the surrounding medium is the propagation of sound.

In underwater acoustics, propagation loss is a measure of the reduction in sound intensity as the sound propagates away from an underwater sound source. It is defined as the difference between the source level and the received sound pressure level.

In a liquid, sound is transmitted by molecules that pass through each other and is usually faster than in a gas.

Sound waves as a whole can propagate as transverse or longitude waves in solids due to transfer of energy. Longitudinal waves are waves that have vibrations along the direction of wave propagation. They are also called pressure waves due to the formation of crests and troughs.