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The hum that only a few can perceive: Potential sources of a low-frequency sound

Some people occasionally hear a low buzzing or humming sound that doesn't have a clear source. An estimated 2–4% of the world's population hear this. Scientists have been trying to figure out for ...
Nature

Broadband low-frequency sound absorption and high insulation in a clay-cement composite with hydrogel-foaming engineered gradient porosity

Urban noise pollution has emerged as a critical environmental issue, driving demand for high-performance cementitious materials with broadband sound absorption capabilities. Conventional porous ...
Popular Science

Low-frequency noise is pervasive. Does that matter?

🛍️ Amazon Prime Day: The best deals chosen by our editors 🛍️ By Lourdes Medrano/Undark Published Apr 17, 2024 8:00 AM EDT This article was originally featured on Undark. For two years, Erica Walker ...
Nature

Emitting and controlling ultra-low frequency underwater acoustic waves using a marine vibration system with time interfacing

The control and manipulation of waves in optical and/or acoustic science and engineering are widespread. Recently, despite reported studies on high frequency acoustic waves via time modulated media, ...