Researchers describe an acoustic meta-surface that uses pingpong balls, with small holes punctured in each, as Helmholtz resonators to create inexpensive but effective low-frequency sound insulation.

Piezoelectrical materials are utilized in various applications, from biomedical (cardiac, auditory, ultrasound, and numerous biosensors) to advanced electronics—including energy production and storage ...

Long-term exposure to low-frequency noise can cause numerous health problems, but the solution may be found in an unexpected object, a pingpong ball. Conventionally thought of as the hollow plastic ...