Is ultrasound a suitable probe to determine the structure of the vortex lattice in ³He-A?

We consider the propagation of ultrasound in 3He-A transverse to the axes of vortices in a regular array. Owing to the sound propagation anisotropy, sharp changes in attenuation should be experimentally observed in the directions of symmetry. The lattice can be oriented by an applied magnetic field, tilted with respect to the rotation axis.