Definition of Sound
Sound is a phenomenon in which pressure disturbances propagate through an elastic material medium. In the context of physics, it is characterised as a mechanical wave of pressure or related quantities (e.g. displacement), whereas in physiological-psychological contexts it implies a hearing process. Though sensitivity to sound varies among all organisms, the human ear is sensitive to audio frequencies ranging from 20 Hz to 20 kHz. More broadly, acoustic waves encompass mechanical longitudinal waves in general.
Examples of the significance and application of sound include music, medical imaging techniques, oral language and parts of science.
Related terms
Speed of sound
The speed of sound is the distance travelled per unit of time by a sound wave as it…
Sound particle
In continuum mechanics, specifically in acoustics, a sound particle refers to a material…
Acoustic wave equation
In physics, the acoustic wave equation is a second-order partial differential equation…
Acoustic wave
Acoustic waves are types of mechanical waves that propagate through matter—such as gas…
Acoustic dispersion
In acoustics, acoustic dispersion is the phenomenon of a sound wave separating into its…
Acoustoelastic effect
The acoustoelastic effect is how the sound velocities (both longitudinal and shear wave…
Attenuation
In physics, attenuation – colloquially, damping – is the gradual loss of flux intensity…
Acoustic emission
Acoustic emission (AE) is the phenomenon of radiation of acoustic (elastic) waves in…
Particle acceleration
In acoustics, particle acceleration is the acceleration (rate of change in speed and…
Frequently asked questions
What is Sound?
Sound is a phenomenon in which pressure disturbances propagate through an elastic material medium. In the context of physics, it is characterised as a mechanical wave of pressure or related quantities (e.g.
Sources & credits
- Wikipedia: Sound – CC BY-SA 4.0
- Image by Infrogmation of New Orleans – CC BY-SA 3.0