k-Wave

1. ofmara
   

   Member
   Joined: Jun '13
   Posts: 1

   Dear All

   thank you for your toolbox.

   In the example_us_defining_transducer.m I have a doubt

   ´% plot the corresponding amplitude spectrums
   figure;
   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-');´´

   if we want to normalized the amplitud spectrum we need change for:

   ´´% plot the corresponding amplitude spectrums
   figure;
   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-');´´

   or all will be normalized by a function of the ´max(as_1(:))´ and why?

   thanks

   Posted 11 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi ofmara,

   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!

   Brad.

   Posted 11 years ago #

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