A type of non-ionizing radiation in which energy is transmitted through solid, liquid, or gas as compression waves. Sound (acoustic or sonic) radiation with frequencies above the audible range is classified as ultrasonic. Sound radiation below the audible range is classified as infrasonic.
    

concept

Acoustics: a carbon microphone invented by D.E. Hughes. Wood engraving by Baud after Broux.

Athanasii Kircheri ... Phonurgia nova sive conjugium mechanico-physicum artis et natvrae paranympha phonosophia concinnatum. Quâ universa sonorum natura, proprietas, vires effectuúmq prodigiosorum causœ, novâ & multiplici experimentorum exhibitione enucleantur; instrumentorum acusticorum, machinarúmq ad naturœ prototypon adaptandarum, tum ad sonos ad remotissima spatia propagandos, tum in abditis domorum recessibus per occultioris ingenii machinamenta clam palámve sermocinandi modus & ratio traditur, tum denique in bellorum tumultibus singularis hujusmodi organorum usus, & praxis per novam phonologiam describitur / [Athanasius Kircher].

Sound / by John Tyndall.

Sound and hearing / by S.S. Stevens, Fred Warshofsky and the editors of Time-Life Books ; consulting editors, René Dubos, Henry Margenau, C.P. Snow.

On the principles of sound; their application in the construction of public buildings; particularly to the new houses of Parliament; and assimilation with the mechanism of the human ear / By A.W. Webster.

Sound

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Catalogue

Sound / by John Tyndall.

Sound and hearing / by S.S. Stevens, Fred Warshofsky and the editors of Time-Life Books ; consulting editors, René Dubos, Henry Margenau, C.P. Snow.

On the principles of sound; their application in the construction of public buildings; particularly to the new houses of Parliament; and assimilation with the mechanism of the human ear / By A.W. Webster.

Acoustics: a carbon microphone invented by D.E. Hughes. Wood engraving by Baud after Broux.

Le son : cours expérimental fait à l'Institution royale / par John Tyndall.