Carpathian Journal of Earth and Environmental Sciences

In this paper was studied the way in which the driver/passengers comfort can be improved during a ride in regard to the vibrations transmitted by the vehicles. For this were measured the vibrations accelerations transmitted by the vehicle when: the driver sits directly on the car seat and the driver sits on a gel-foam cushion or on ergonomic seat cushion, in different cases: driving on asphalt, on macadam and on ground. For this the accelerometers were fixed on the floor, on the seat, on the lumbar, on the cervical and on the forehead, at ten male subjects with different body weights, ages and work experience. Comparisons were made between the root mean square average vibration, the vibration dose value, the time period needed to reach the value of the exposure which triggers the action and the limit exposure value, TWA Peak, Raw (+/-) Peak and the seat effective amplitude transmissibility for Aw and VDV. It was discovered that all the values which are specific to the vibrations transmitted by the vehicle to the entire body of the driver/passengers are notable modified, scilicet the travelling conditions are improved, if gel-foam cushion or ergonomic seat cushion are used. Because of this we move that all the seats in transportation: car, public transportation and work equipment should be provided from start with vibrations dampers, preferable ergonomic seats with gel-foam cushion included.