Acoustic loading noise
= Acoustic loading noise
{title2=$-\partial_i(F_i\delta_s)$}
Loading noise is the <acoustic dipole> radiation of the <force> exerted by a body on its surrounding fluid. For a compact, slowly moving source, the radiating <acoustic density perturbation> is $n\cdot\dot{\mathcal F}(t-R/c_0)/(4\pi c_0^3R)$, where $\mathcal F$ is the total <force>. If this total is constant, finite source-delay corrections can still create higher <acoustic multipole sources>.