Strong seismic scatterers near the core - mantle boundary north of the Pacific Anomaly. (polenet.org)
Ma, X., Sun, X., Wiens, D., Nyblade, A., Anandakrishnan, S., Aster, R., Huerta, A., Wilson, T., Strong scatterers near the core - mantle boundary, north of the Pacific anomaly, from PKP precursors recorded by Antarctic arrays, proc. (polenet.org)
The effect the reader asked about will be most noticeable when the hands are close to the receiver, although very good scatterers (such as aircraft) can exert an effect at great distances. (scientificamerican.com)