The present medicine expert on the one hand had bdlieved that the carsickness,seasickness,airsickness gets sick or motion sickness caused by motion ,but on the other hand had believed the definitive cause of that the motion sickness also donot know.Because this would not explain the no matter how motion can not caused carsickness ,when the people by all these Train， Tnuck,Motorcycle,Tractor .Because,of the Infrasonic sound or the noise of low frequency is extremely small.
But in reality all these carsickness,seasickness,airsickness gets sick or motion sickness caused by Infrasonic sound or the noise of low frequency.Of instance,(1)this would explainthe no matter how motion can not caused carsickness ,when the people by all these Train， Tnuck,Motorcycle,Tractor .Because,of the Infrasonic sound or the noise of low frequency is extremely small.(2) The Seasickness disease incidence rate is highest,too,The noise is biggest in speed boat of among all sorts of ships.(3) Airsickness disease incidence rate is highest,too,The noise is biggest in Jet of among all sorts of Planes. (4)The more human is hearing is poor ,the more motion sickness is low incidence of illness , Of instance,The mon is low incidence of illness of motion sickness than woman,the man is inferior to the woman in hearing.(5) The old people is low incidence of illness of motion sickness than young,the old people is inferior to the young in hearing .(6)The deaf mute can not results in motion sickness,the deaf mute can not hear.
But it was most important to scientists had confirmed motion sickness caused by Infrasonic sound or the noise of low frequency(reference: www.vibrostop.it/support/basic.html)

Is it true that deaf people don't get motion sickness?

Do you have any references confirming that?

What ever the cause of the nausea a little bit of the spice ginger appears to help it go away.

Please references to the http://faq.emetophobia.net/vomiting.html concerning this matter of deaf people.

Interesting site. Another interesting thing I notice about motion sickness - particularly car sickness, which I am prone to - is that when I drive, I never get symptoms. Never. But as a passenger, look out. I believe this has to do mainly with two things. First is the psychological effect of not being in control of the situation which makes me more nervous and promotes feelings of nausea. Second is the lack of feedback for my anticipated motions as a driver. As a driver I know exactly what the motion of the vehicle is scince I'm controlling it. Interesting.

Moreover this theory about motion sickness caused by all kinds of acceleration of different directions and size or Coriolis acceleration (,reference: www.remarkablemedicine.com/Clinical/clinicaluses/otherdisorders/motion.html),Overthrow Newton's second law of motion.Because,Newton's second law of motion says anly by calculate a man or an object is influenced by size of the resultant force can know a man or an object is influenced by the size of the in reality acceleration.of instance, the astronaut is affected by the Gravitation acceleration as well as the centrifugal force acceleration in space,But the in reality affected by acceleration equal for zero..
So,this idea not only was a fraud but it was maximum jest in human scientific history.

Fifty years ago, more or less, Republic Aviation built a turboprop jet fighter based on the F84. It was designed to be transonic and the design propellor tip speed was supersonic. During ground tests of full power and prop RPM it was discovered that every member of the ground crew was rendered violently nauseous by the resulting high frequency ( beyond normal hearing range ) noise.

They knew rendered violently nauseous noise of an airplane,they calling this a "conditioned reflex,"Their statement rather absurd.

Space motion sickness is caused by the infrasonic or the noise of low frequency,too.Of instance,the power of the engine of Mercury and Gemini is small that the infrasonic or noise of Mercury and Gemini is small.So,Mercury and Gemini space flight astronauts did not experience space motion sickness.