TY - CONF A1 - Algernon, Daniel A1 - Wiggenhauser, Herbert A1 - Schubert, F. T1 - Impact-echo: experimental and numerical study of acoustic wave propagation T2 - 2006 NDE Conference on Civil Engineering T2 - 2006 NDE Conference on Civil Engineering CY - St. Louis, MO, USA DA - 2006-08-14 PY - 2006 AN - OPUS4-14071 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -