Abstract
A simple analytical model of the horizontal noise field associated with a shipping lane has been developed which is based on a set of acoustic line radiators having uniform linear source density. This simple model has been computer coded and compared with a more complex model containing dynamic positioning of up to 1500 discrete ships. It was found that the simple model gives a comparable estimate of the smoothed horizontal noise field and also provides physical insights into the factors determining horizontal directionality of ambient noise in the ocean. In this presentation, the line radiator model is used to investigate the sensitivity of the shape and magnitude of the horizontal noise field related to a single arbitrary shipping lane. Parameters studies are lane widths and cross‐sectional shape, distance from receiver point as well as the effects of different propagation conditions [work supported by Office of Naval Research (Long Range Acoustic Propagation Program) and Defence Scientific Research Establishment, NZ.]
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