http://www.k-wave.org/forum/topic/the-value-of-unlrasound-attenuaiton-in-water Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:31:52 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/the-value-of-unlrasound-attenuaiton-in-water#post-7245 Sat, 29 Feb 2020 04:36:31 +0000 wen 7245@http://www.k-wave.org/forum/ <p>Dear vich, thank you! That helps a lot. </p> http://www.k-wave.org/forum/topic/the-value-of-unlrasound-attenuaiton-in-water#post-7244 Sat, 29 Feb 2020 00:59:58 +0000 vich 7244@http://www.k-wave.org/forum/ <p>Hi wen! According to Kinsler's Fundamentals of Acoustics, 4th ed, page 218, the acoustic <em>absorption</em> of pure water should be around <code>0.00217 f^2</code> [dB/cm], with the wave frequency <code>f</code> given in MHz. The attenuation coefficient should be close to that, given the nature of water. I would think the values you indicated are pretty good. </p> http://www.k-wave.org/forum/topic/the-value-of-unlrasound-attenuaiton-in-water#post-7241 Thu, 27 Feb 2020 02:27:55 +0000 wen 7241@http://www.k-wave.org/forum/ <p>Hi,</p> <p>I'm simulating the ultrasound propogation in water using a broadband transducer. But I'm still not sure about the attenuation value after searching some papers. Could anyone help provide a reference about it?<br /> I set the two values as below, but I'm not sure.<br /> medium.alpha_coeff = 0.002; % [dB/(MHz^y cm)]<br /> medium.alpha_power = 2;</p> <p>Best regards!<br /> wenxiu </p>