http://www.k-wave.org/forum/topic/normalized-amplitud-spectrum Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 03:45:19 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/normalized-amplitud-spectrum#post-3827 Thu, 25 Jul 2013 19:03:43 +0000 Bradley Treeby 3827@http://www.k-wave.org/forum/ <p>Hi ofmara,</p> <p>The recorded spectra are all normalised against the first waveform so that it is easy to compare the relative magnitudes of the harmonics. This makes it clear that the magnitude of the fundamental has decreased from position 1 to position 2, while the magnitude of the second harmonic has increased. You are of course welcome to modify this if you'd like to see something else!</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/normalized-amplitud-spectrum#post-3823 Thu, 25 Jul 2013 18:31:19 +0000 ofmara 3823@http://www.k-wave.org/forum/ <p>Dear All</p> <p>thank you for your toolbox.</p> <p>In the example_us_defining_transducer.m I have a doubt </p> <p>´% plot the corresponding amplitude spectrums<br /> figure;<br /> plot(f/1e6, as_1./max(as_1(:)), 'k-', f/1e6, as_2./max(as_1(:)), 'b-', f/1e6, as_3./max(as_1(:)), 'r-');´´</p> <p>if we want to normalized the amplitud spectrum we need change for: </p> <p>´´% plot the corresponding amplitude spectrums<br /> figure;<br /> plot(f/1e6, as_1./max(as_1(:)), 'k-', f/1e6, as_2./max(as_2(:)), 'b-', f/1e6, as_3./max(as_3(:)), 'r-');´´</p> <p>or all will be normalized by a function of the ´max(as_1(:))´ and why?</p> <p>thanks </p>