Pressure and pressure components

The recent development of Vertical Sensor Arrays (VSAs) is leading to the integration of particle velocity calculations in the ray tracing models. Bellhop incorporates this feature through the calculation of pressure components, which are proportional to the components of particle velocity. Again, to illustrate this, let us modify nearsource.env as follows:

'Munk profile/Near source field'
50.0			
1			
'SVF'			
51  0.0  5000.0 
    0.0  1548.52  /
  200.0  1530.29  /
  250.0  1526.69  /
  400.0  1517.78  /
  600.0  1509.49  /
  800.0  1504.30  /
 1000.0  1501.38  /
 1200.0  1500.14  /
 1400.0  1500.12  /
 1600.0  1501.02  /
 1800.0  1502.57  /
 2000.0  1504.62  /
 2200.0  1507.02  /
 2400.0  1509.69  /
 2600.0  1512.55  /
 2800.0  1515.56  /
 3000.0  1518.67  /
 3200.0  1521.85  /
 3400.0  1525.10  /
 3600.0  1528.38  /
 3800.0  1531.70  /
 4000.0  1535.04  /
 4200.0  1538.39  /
 4400.0  1541.76  /
 4600.0  1545.14  /
 4800.0  1548.52  /
 5000.0  1551.91  /
'A'  0.0
 5000.0  1600.00 0.0 1.8 .8 /
1
  1000.0 /	
501
    0.0 2000.0 /
501
  0.0  30.0 /
'CR'	  	
201
 -25.0 25.0  /       
100.0  5500.0  102.0,
'MS' 1.0  100.0 0,
3  5

Again, running Bellhop we can obtain Fig.12. Modifying the last line to

3  5 'H'

and

3  5 'V'

allows to obtain Fig.13 and Fig.14, respectively.

Figure 12: Coherent transmission loss calculated from acoustic pressure using ray centered coordinates.

Figure 13: Coherent transmission loss calculated from the horizontal component of acoustic pressure.

Figure 14: Coherent transmission loss calculated from the vertical component of acoustic pressure.