When a ship moves up and down as a result of the waves in the water, its elevation relative to the average sea level varies. If we measure barometric pressure, we can show that barometric pressure varies with elevation, this is a common method of measuring altitude. The barometric pressure drops by 12 Pascals for every meter of increase in elevation above average sea level. If we bob up and own by a total of +/- 0.5 meters we are being exposed to infrasound of a magnitude of about 105dB at a frequency corresponding to the rate of bobbing, probably in the range of 0.2 to 0.5 Hz. Is it the motion of bobbing up and down or the related presence of infrasound that makes some people nauseous? Mr. Dooley is the first to claim that the cause is indeed the presence of infrasound.
Kevin Allan Dooley Inc. are in the midst of developing infrasound suppression technology that can be outfitted in cruise ship cabins, to provide a safe-haven for passengers experiencing motion sickness symptoms. A Florida-Caribbean Cruise Association (FCCA) report stated that there were 17.2 million sea voyagers in 2012 in the North American market alone, with 11.2 million passengers holding a US or Canadian citizenship. The amount of lost revenue due to motion sickness is unknown at this time, but ISD technology would equip cruise lines to re-capture revenues from this lost segment of the voyaging marketplace. Kevin Allan Dooley Inc. is currently pursuing partnership with cruise liners to conduct further research on industry application.