If you have ever rubbed a clean, wet finger on the edge of a wine glass, you may have heard the wine glasses make a singing sound. As your finger moves along the rim of the glass, it sticks and slides ...

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.

Living human cells have resonant frequencies – rates at which they will naturally oscillate if the conditions are right. This has been suspected for decades, but researchers have now measured what ...