The Journal of the Acoustical Society of America · 1968 · 14 citations · 0 references
EngineeringMarine EngineeringOcean EngineeringAcousticsOcean AcousticsUnderwater AcousticsAcoustic Sensing SystemsAcoustic SensorsSonar SystemsTransducer TechnologyUltrasonicsUnderwater Sound PropagationExternal Pressure DistributionPressure FieldsSignal-to-noise AnalysisSignal-to-noise EnhancementSignal-to-noise RatioSonar Transducer DesignTransducer DesignTurbulent Boundary Layers
An analysis of the changes that are induced by a dome in the signal to-noise (S/N) ratio of a sonar system is performed. Both the transducer system and the dome are idealized in this analysis. A blanket dome and a plate dome are considered. It is shown that a properly designed dome can be made transparent to supersonic spectral components in the external pressure field and can reduce the response of the transducer system to subsonic spectral components in this pressure field. A dome can thus be emp oyed to increase the S/N ratio of a sonar system that is subjected to noise-pressure fields that possess high density of subsonic spectral components. The external pressure field considered in this paper is composed of the blocked pressure field induced by an incident plane acoustic-pressure field (the signal-pressure field) and the blocked pressure field of a subsonic turbulent boundary layer (the noise-pressure field).