http://www.k-wave.org/forum/topic/how-to-interpret-the-wavenumber-component-vector Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 00:22:41 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/how-to-interpret-the-wavenumber-component-vector#post-8434 Sat, 22 Jan 2022 12:09:48 +0000 chiragjin 8434@http://www.k-wave.org/forum/ <p>I am also a beginner in this space and came across the following youtube video some days back. It provides a practical feel of how wavenumber works. Hope it helps.</p> <p><a href="https://www.youtube.com/watch?v=02J_j6SWH_M&amp;list=PLUoFce-1LZKqaSpFtHUSaGYBebmEmitFj&amp;index=7&amp;ab_channel=BE280A" rel="nofollow">https://www.youtube.com/watch?v=02J_j6SWH_M&amp;list=PLUoFce-1LZKqaSpFtHUSaGYBebmEmitFj&amp;index=7&amp;ab_channel=BE280A</a></p> <p>Chirag </p> http://www.k-wave.org/forum/topic/how-to-interpret-the-wavenumber-component-vector#post-8428 Fri, 14 Jan 2022 21:01:37 +0000 shanchengbao09@tamu.edu 8428@http://www.k-wave.org/forum/ <p>Thanks so much. I think I understand it now </p> http://www.k-wave.org/forum/topic/how-to-interpret-the-wavenumber-component-vector#post-8423 Thu, 13 Jan 2022 14:09:29 +0000 Bradley Treeby 8423@http://www.k-wave.org/forum/ <p>Imagine taking a signal containing a sine wave with single spatial frequency (wavenumber). If you take a Fourier transform of the signal, you will see a peak at the frequency of the sine wave. The wavenumber vector you describe essentially specifies the frequency axis of the Fourier transform. The actual wavenumbers present will depend on the waves present in the signal.</p> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/how-to-interpret-the-wavenumber-component-vector#post-8420 Sun, 09 Jan 2022 23:53:14 +0000 shanchengbao09@tamu.edu 8420@http://www.k-wave.org/forum/ <p>I am a rookie in K-Wave. Pretty confused by the definition and formula of wavenumber component vector:<br /> To my understand, wavenumber is defined as the number of radians per unit distance: 2*pi/WaveLength. However, in the kWaveGrid.m, kx_vec = (2*pi/dx) .* nx, where dx is the grid size, nx is an array from -0.5 to +0.5. How is the output kx_vec relate to the number of radians per unit distance?</p> <p>Appreciate if anyone can provide a general explanation to this point or provide some reading materials. Thanks so much </p>