(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hi there,

I am a beginner in acoustics and there are severals problems I am currently struggling while I was reading the first chapter of "Theory of Vortex Sound" (available on Google books).

2. Relevant equations:

For Q4

3. The attempt at a solution

For Q2 and 3, as underlined in the first picture, if the velocity and pressure doesn't go like 1/r , the integral will diverge as r-> inf. However, there are no 1/r terms in U_{0}cos(wt)

For Q4,

I am not sure how to proceed, since the variableyis contained in two terms within the dirac delta,I don't know how to eliminate it.

BTW, I googled sth that might be helpful for Q4.

(From P.115-116 of https://books.google.co.uk/books?id...WAhVKDxoKHe_nDiQQ6AEIMjAC#v=onepage&q&f=false )

Thanks very much!!

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# Homework Help: Introductory acoustics

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