Speaker: Prof Tim G. Leighton FRS
Institute of Sound and Vibration Research, University of Southampton
The sound of waterfalls and breaking ocean waves are caused by gas bubbles which, when formed underwater, ring like tiny bells.
By understanding how bubbles make sound and then listening to the ocean we can track the transport of carbon dioxide from atmosphere to ocean when ocean waves break. By understanding how bubbles 'hum' when sound is projected at them we can work out how whales and dolphins use sound for hunting and deduce the extraordinary maths being used when doing this. The lecture closes by discussing how bubbles and sound can be used in mitigating antibiotic resistance - a resistance which by 2050 may be killing more people than cancer.
Image: Humpback whales feeding on a trapped fish shoal.
(©Carl Safina, safinacentre.org)