Kirchhoff–Helmholtz integral
The Kirchhoff–Helmholtz integral combines the Helmholtz equation with the Kirchhoff integral theorem[1] to produce a method applicable to acoustics,[2] seismology[3] and other disciplines involving wave propagation.
It states that the sound pressure is completely determined within a volume free of sources, if sound pressure and velocity are determined in all points on its surface.
References
- Kurt Heutschi (2013-01-25), Acoustics I: sound field calculations (PDF)
- Oleg A. Godin (August 1998), The Kirchhoff–Helmholtz integral theorem and related identities for waves in an inhomogeneous moving fluid, Journal of the Acoustical Society of America
- Patricia Scott; Don Helmberger (1983), Applications of the Kirchhoff-Helmholtz integral to problems in seismology (PDF)
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