= Applied Acoustics Lectures 12–14 by Peter H. Dahl
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{tag=Work by Peter H. Dahl}
{title2=ME525; 2024 compilation}
Author lecture notes, University of Washington: https://oalib-acoustics.org/website_resources/xxeducation/ME525_2024/Lectures%2012-13-14.pdf
Lecture 13, printed pp. 6–8 (PDF pp. 15–17), distinguishes hydrodynamic and geometric near/far fields. Lecture 14, printed pp. 1–3 (PDF pp. 19–21), derives the Fraunhofer distance expansion and aperture Fourier transform, with quadratic phase error k L squared/(8 r). Lecture 14 retains a Winter 2022 heading; the compilation footer is 2024. Names and affiliation verified on the lecture title pages.
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