Print Email Facebook Twitter The sonar equation and the definitions of propagation loss Title The sonar equation and the definitions of propagation loss Author Ainslie, M.A. TNO Fysisch en Elektronisch Laboratorium Publication year 2004 Abstract A rigorous application of the traditional definition of sonar equation terms leads to the appearance of an unexpected factor, not routinely included, equal to the ratio of the characteristic impedance at the receiver to that at the source. An omission of this factor can lead to non-negligible errors for realistic conditions. It is further argued that a gradual change in the de facto definition of propagation loss occurred between 1965 and 1980. Two alternatives to the traditional sonar equation are suggested, each using one of the two propagation loss definitions and both eliminating the unwanted impedance ratio. © 2004 Acoustical Society of America. Subject SonarAcoustic wave propagationSonarUnderwater acousticsEcholocationSignal noise ratioSound detectionSound intensitySound transmission To reference this document use: http://resolver.tudelft.nl/uuid:d4b4913b-9d8b-4fcd-a0d9-4f523a7ef7e7 DOI https://doi.org/10.1121/1.1631939 TNO identifier 95617 Source Journal of the Acoustical Society of America, 115 (1), 131-134 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.