Bone Abstracts

An orthogonally-anisotropic Biot-Johnson-Allard (BJA) model in which the dependences of tortuosity on porosity and angle are determined empirically from acoustic measurements on bone replicas has been developed. Phase velocities and attenuations of the fast and slow waves versus frequency, porosity and angle of propagation have been predicted by using BJA model. The attenuation of the fast wave is below 0.5 Np/m throughout the frequency and propagation angle range. The attenua...