Salmon farmers in British Columbia, Canada, used amplified sounds underwater – the volume was equivalent to a jet engine taking off – to frighten seals away.
I drove to Hemenway Harbor, near the lake's southwestern corner, and parked in a sloping lot that not many years ago would have been underwater: Mead's volume has fallen by roughly sixty per cent since 1998, the last time it was full.
Helmholtz resonators with an opening on the side of the cavity have the potential to improve the limitations of closed cavity resonators as a practical means for determining sample volume underwater.
This is significant because only two other studies have been able to simultaneously measured residual lung volume while underwater weighing in children [ 13, 14].
O'Rourke pointed out that while many of these stocks are actually still up for 2014 on an absolute basis, buyers this year are underwater, based on the shares' volume-weighted average price (VWAP).
After two practice trials, underwater weight and the residual lung volume were measured simultaneously 5 times.
For direct drive (pistonless) projectors made of [011]-poled PZN-5.5%PT single crystal of ≤62 mm3 in volume, the source levels of underwater sound generated via respective TROB and CTW modes are comparable and can be >180 dB re 1 μPa @ 1 m, which can be combined to advantage to form a broad bandwidth underwater projector.
Body composition was estimated by underwater weighing with determination of residual lung volume by helium dilution (20 participants) or by total-body dual-energy X-ray absorptiometry (DPX-L; Lunar Radiation, Madison, WI) (56 participants).
The magician David Blaine is reported to have lost more than 30 pounds before attempting to beat the world record for holding breath underwater, in an effort to improve his ratio of body volume to lung volume.[3].
Body composition was calculated based on underwater weighing with simultaneous measurement of residual lung volume using the helium dilution technique (Volugraph 2000, Mijnhardt).
