Posted in biology, chemistry, engineering, music

Sound blocks spores

As blogged about by the Arxiv Blog, sound, or “acoustic trapping,” can be used to filter bacterial spores from water, according to a new set of experiments funded by the U.S. Army.

Filtering water is trickier than it sounds, because so far most water filters have been designed to filter only certain shapes of bacteria or chemically attack certain types. Both require intenstive human intervention.

“The U.S. Army is funding a project to determine whether sound can help. The idea is to allow the water to flow through a cavity in which a transducer sets up an acoustic standing wave. Any bacterial spores in the water are then subjected to three forces: buoyancy/gravity, the drag of the fluid as flows along and the acoustic pressure from the standing wave.”

See the pictures and more



Beth Kelley is an applied & digital anthropologist with an overall interest in how people engage with and are impacted by their environments and vice versa. This has manifested itself in many ways, by looking at creativity, playful spaces, built environments, and environmental enrichment, sustainability, design research, and integrative and collaborative models of learning such as through play and hands-on learning.

One thought on “Sound blocks spores

  1. Interesting.I’ve also found that one listen to any Beatles record works better than most antibacterial medicines. Seriously, though, this is cool.

Comments are closed.