When sound strikes soft materials, much of the sound is absorbed. A sound insulator is a material that absorbs most of the energy of sound waves.
Geologists use their knowledge of rocks to help them locate oil resevoirs.
Earthquakes can be tracked and their waves understood once the geologist understands how the earthquake waves travel through different kinds of rocks and magma.
- Ocean exploration
- Earthquake vibrations and waves
- Marine mamals and bats use sonar location
- The millitary uses sonar in submarines and in planes