That’s why Empa researchers teamed up with de Cavis to develop ultra-thin sound absorbers made from gypsum or cement foams.

Many things have combined to make very high-frequency RF gear much more common, cheaper, and better performing. Case in point: [dereksgc] is tearing apart a 20 GHz low-noise block (LNB).

Soft whirring sound of low-frequency vibrations cannot be easily detected because it is not loud. But once detected, it can be hard to ignore. Often, residents complain of the annoyance caused by ...

There may be things people miss about working in an office, but noise isn't one of them. Researchers have developed a new technique for blocking sound—by putting holes in the walls and ceilings.

The low-frequency noise coming from a local factory continues to bother residents in Bristol and beyond. By Caitlin Burchill • Published January 23, 2025 • Updated on January 23, 2025 at 6:02 pm ...