If you live in a city, near a highway, or an airport, you may be bothered by a variety of low-frequency noises emitted by cars and airplanes. Research results have been announced that ``ping pong ...

Noises such as car engine noises not only interfere with activities, but are also thought to lead to health problems such as headaches, dizziness, and neurosis, and various countermeasures have been ...

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.

This report deals with a theoretical and experiments investigation into the characteristics of Helmholtz resonators as sound absorbers. Raschevkin and others have investigated the problem ...

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 ...