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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).
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).
Lecture 1-1: Sounds and Vibrations 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.
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.
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.
The scientific method is a means of uncovering and explaining physical phenomena. It relies on observation and logical reasoning to achieve insight into the actions and relations of the phenomena, and a means of relating it to similar items. The method starts with observations and measurements.
