this post was submitted on 09 Apr 2026
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As additional background, here is my paper on the diffraction of waves through an aperture. The low frequency response of an acoustic guitar results from the interaction of the acoustic body and aperture (sound hole). Understanding an aperture’s electromagnetic response is essential to understanding the EM Helmholtz resonance. https://www.researchgate.net/publication/258555911_The_dipole_impedance_of_an_aperture