The acoustic radiation force exerted by a traveling plane wave on a coated sphere was theoretically investigated. After carefully re-calculating the scattering coefficients of a model presented by Mitri [Eur. Phys. J. B 43, 379-386 (2005)], a missing term is found that is related to absorption in the particle shell. By amending the theory, it is shown that nonphysical consequences predicted earlier disappear. The homogeneous sphere results in the long-wavelength limit are also correctly recovered.
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