http://www.k-wave.org/forum/topic/what-is-the-formula-for-calculating-the-acoustic-intensity Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:40:25 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/what-is-the-formula-for-calculating-the-acoustic-intensity#post-8763 Thu, 18 May 2023 20:19:45 +0000 Bradley Treeby 8763@http://www.k-wave.org/forum/ <p>This formula shouldn’t have the f in the denominator. Without the f, it gives you the time average intensity under the assumption of a plane wave (and a time average over an integer number of periods or a long signal), where P is the amplitude of the acoustic wave. It will give a reasonable approximation near the focus of a focused transducer, but may become inaccurate away from it, depending on the shape of the field. </p> http://www.k-wave.org/forum/topic/what-is-the-formula-for-calculating-the-acoustic-intensity#post-8748 Mon, 01 May 2023 19:40:09 +0000 shanchengbao09@tamu.edu 8748@http://www.k-wave.org/forum/ <p>Except for the site of peak intensity (Isppa), I also need to calculate the intensity of other sites. Can I ask if this formula is correct?</p> <p>I = (P^2)/(2*rho*c*f)<br /> P: pressure<br /> rho: medium density<br /> c: acoustic speed<br /> f: frequency</p> <p>I checked online; however, there are more than one answer. Thank you very much. </p>