Abstract
An acoustic signal or an acoustic disturbance consists of pressure oscillations traveling in an elastic medium. The variation of pressure can either be triggered by a vibrating surface (for example, diaphragm of a speaker) or by a turbulent fluid flow. In a broad sense, a sound wave is any disturbance that propagates in an elastic medium, which may be either a gas, a liquid, or a solid.
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References
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Sengupta, T.K., Bhumkar, Y.G. (2020). Acoustic Wave Equation. In: Computational Aerodynamics and Aeroacoustics. Springer, Singapore. https://doi.org/10.1007/978-981-15-4284-8_6
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DOI: https://doi.org/10.1007/978-981-15-4284-8_6
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