Properties of Corprene, revisited

Corprene has long been used in underwater projectors and receivers as an acoustic isolation material. Based on data initially reported by Higgs and Eriksson for type DC-100 Corprene [J. Acoust. Soc. Am. 46, 1254-1258 (1969)], a simple set of empirical relations is formulated that allow its density, sound speed, and acoustic attenuation to be estimated over a wide range of pressures. Laboratory measurements of the compressibility of recently manufactured material are also reported. One of the primary motivations behind this present study is to accurately determine the compressibility of Corprene. This information is needed to ascertain the variable ballast in a submersible as it goes to depth. This newly reported data, which additionally include measurement of hysteresis, agree with the results published by the aforementioned authors, indicating that this common material has remained unchanged over the past four decades.