3. Results and discussion
As the SNOW-BL code simulates the acoustic propagation in bubbly liquids [17], we can illustrate the theory described above
with the following example. The central frequency of the pulses at the input is assumed to be xm ¼ 4:7 MHz. Thereby, as said above for attenuation purpose, the bubbles we chose here for taking up the water in the BL are such that R0g ¼ 4:5 lm and Ng ¼ 1 1012 bubbles=m3