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Acoustics: the study of sound waves Sound is the phenomenon we experience when our ears are excited by vibrations in the gas that surrounds us. As an object vibrates, it sets the surrounding air in motion, sending alternating waves of compression and rarefaction radiating outward from the object.
introduction. Sound is a longitudinal, mechanical wave. Sound can travel through any medium, but it cannot travel through a vacuum. There is no sound in outer space. Sound is a variation in pressure. A region of increased pressure on a sound wave is called a compression (or condensation).
Overview. 1. Physical characteristics of sound. Physically, sounds are fluctuations in air pressure which travel through the air in the form of longitudinal pressure waves. Longitudinal refers to the fact that the waves of compression and rarefaction lie along the direction of travel.
Sound is a physical disturbance in the medium through which it is propagated. Although the most common medium is air, sound can travel in any solid, liquid, or gas. In air, sound consists of localized variations in pressure above and below normal atmospheric pressure (compressions and rarefactions).
What is sound? It’s the wave that is created by vibrating objects and propagated through an elastic medium from one location to another. Air is an example of elastic medium . Elasticity of the medium increased as the distant between the molecules decreased. Cont. Sound . Solid is more elastic than liquid which is in turn more elastic than air .
This article is an introduction to the physics of waves as it relates to sound propagation. While it does not require a background in physics to understand, it is assumed that the reader has at least high school level linear algebra, calculus, and trigonometry.
Sound waves are longitudinal waves. As the teacher talks, students hear the voice because particles of air move from the mouth of the teacher to the ear of the student. Sound waves are mechanical waves. All sound waves are produced by a vibrating object. A sound wave does not consist of crests and troughs. Mac is talking to Kate.
