Squared pressure summer

Squared pressure summer

Output

Plots and tables

1. Noise/target level as a function of horizontal and vertical angles

2. Sound-speed profile

Figure 7.2 Block diagram of the RANDI noise model (Wagstaff, 1973).

Sensor

Sensor

Noise source plane

Isotropic noise

Surface

Noise source plane

Anisotropic f y y y y y noise

Distant

Isotropic noise

(SOFAR channel) noise

Bottom

Figure 7.3 The noise field used in the RANDI model (Wagstaff, 1973).

noise field is presented in Figure 7.4 (note that the units for noise level are referenced to degrees).

The vertical directionality of the noise field is determined for a differential vertical angle by first calculating the area defined by the intersections of the corresponding ray bundles with the anisotropic noise field plane (i.e. shipping noise). Next, these areal extents are multiplied by the local effective squared noise pressure levels. The resulting levels are reduced by the

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