/*attenuation of SAW over defined traveling length on steel*/
d_zSmaxstart : 314e-12$ /*displacement at first measure position*/
d_zSmaxende : 237e-12$ /*displacement at second measure position*/
yposstart : 0$ /*first measure position*/
yposende : 26.5e-3$ /*second measure position*/
laufstrecke : yposende-yposstart$   /*traveling length*/
alpha : float(20*log(d_zSmaxstart/d_zSmaxende)/log(10)/laufstrecke); /*attenuation in dB/m*/
alphapromm : float(alpha/1e3); /*attenuation in dB/m*/;