SOUND VIBRATIONS AND WAVE PROPERTIES OF SOUND

Abstract

This article explores the nature of sound vibrations and their wave properties. Sound is defined as a mechanical wave generated by a vibrating object, such as a tuning fork or human vocal cords, which causes the surrounding air molecules to oscillate. These oscillations are transmitted through the medium, eventually reaching the eardrum and converting into nerve impulses perceived by the brain. The study discusses the frequency range of sound waves audible to the human ear (approximately 20 to 20,000 Hz) and distinguishes between audible sound, infrasound (below 20 Hz), and ultrasound (above 20,000 Hz), which are inaudible to humans. It also examines the propagation characteristics of sound in different media: longitudinal waves in gases and liquids, and both longitudinal and transverse waves in solids. Furthermore, the paper addresses the subjective perception of sound (pitch, timbre, and loudness) and their corresponding physical parameters. It is noted that any real sound consists of a combination of harmonic oscillations with a specific frequency spectrum, referred to as the acoustic spectrum.