Physicists from Osaka Metropolitan University and the Korea Advanced Institute of Science and Technology were able to observe ...

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.

CC0 Usage Conditions ApplyClick for more information. Observe a demonstration of Helmholtz Resonators from the Physical Science Collection at the Smithsonian's National Museum of American History.

Combining principles from computational fluid dynamics and acoustics, researchers have developed an analytical model that could simplify the process of designing Helmholtz resonators, a type of noise ...

This is a preview. Log in through your library . Abstract The air induction system of an automobile engine contributes to the noise level generated by a passenger car. The contribution is significant ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Herman von Helmholtz (1821-1894), a ...

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 ...