Include acoustic attenuation so that the acoustic field attenuates over distance

(2 posts) (2 voices)

alan.keenan

Member
Joined: Oct '20
Posts: 2

I am using the Bernstein and Spicer equations for shear wave acoustic field calculations due to pulsed laser excitation in the non ablative regime.
D_S = - s_T ^ 4 * cos(2 * theta) .* sin(2 * theta) ./ ...
(s_T ^ 4 * (1 - 2 * cos(theta) .^ 2) .^ 2 + 4 * s_T ^ 3 .* cos(theta) .^ 2 .* sin(theta) .* sqrt(s_L ^ 2 - (s_T * cos(theta)) .^ 2));
Beam spreading is present in the resulting images, however, there is no acoustic attenuation with distance. Is it possible to introduce a function that will attenuate the acoustic field with distance? The material model is aluminium.

Posted 2 years ago #
bencox

Developer
Joined: Mar '10
Posts: 292

Hi alan,

Which simulation function are you using? In pstdElastic3D you can set the absorption using medium.alpha_coeff_compression and medium.alpha_coeff_shear.

Best wishes
Ben

Posted 2 years ago #

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