Infrasound is very low-frequency sound, below 20 Hertz (Hz), which humans typically can't hear. It can come from natural ...

My wife, Marie, and I recently returned from a week vacationing on Block Island. Access to the island is by ferryboat from Point Judith, Rhode Island. Marie has a special relationship with Block ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

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 ...

Those living in or around Bristol say a low-frequency sound coming from the Reworld facility continues to be a nuisance. Our NBC CT Responds team was first to listen and share stories of community ...

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.