Speed of Sound in Four Elastomers
NAVAL RESEARCH LAB WASHINGTON DC
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Measurements made at 5-7 kHz on four elastomer compounds provide sound speed values as a function of both temperature 5- 40 C and hydrostatic pressure atm to 10000 psi. It is found that the sound speed can vary widely in each elastomer compound and that changes in sound speed caused by temperature changes are less predictable than those caused by hydrostatic pressure changes. Compounding of a given type of elastomer butyl compounds with different ingredients, for example produces materials with each having its own sound speed-versus- temperature characteristic. Even though the rho-c of the elastomer may match that of water at some combination of temperature and hydrostatic pressure, it does not necessarily do so at all temperatures and pressures.
- Elastomers and Rubber
- Acoustic Detection and Detectors