As any percussionist or fidgety pen-tapper can tell you, different materials make different noises when you hit them. Researchers at Drexel University hope this foundational acoustic phenomenon could ...

A recent study showed that it is possible to discern the composition of a buried pipe by striking an accessible portion of it and monitoring the sound waves that reach the surface. This method could ...

Researchers at Drexel University have published research showing that acoustic wave propogation can be used to identify buried lead water lines. As any percussionist or fidgety pen-tapper can tell you ...