k-Wave User Forum » Topic: Is PML still effective in low frequency http://www.k-wave.org/forum/topic/is-pml-still-effective-in-low-frequency-1 Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:09:09 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://www.k-wave.org/forum/search.php lyz2001 on "Is PML still effective in low frequency" http://www.k-wave.org/forum/topic/is-pml-still-effective-in-low-frequency-1#post-9137 Sat, 31 Aug 2024 05:53:15 +0000 lyz2001 9137@http://www.k-wave.org/forum/ <p>Hi,everyone<br /> As we all know, PML is used to weaken the spatial aliasing effect.But it seems dosen't work on low frequency(500Hz-1kHz),no matter the thickness of the PML<br /> For example, if I put a source on the left side of the grid（140dB）， and set a very thick PML（&gt;200points）,there is still sound waves from the right side of the grid in the beginning of the simulation,which doesn't agree with the absorption ability in the k-Wave manual.<br /> So I want to ask is PML still effective in low frequency.</p> <p>Lyz2001 </p>