The vibration characteristics of car seats directly influence the ride comfort. Polyurethane foam is key part a seat, and its physical parameters have an important impact on seat. In this study, thickness hardness seat cushion with different excitation magnitudes was investigated by using transmissibility effective amplitude (SEAT) value. First, tests were carried out at vertical simulator widt...

Results Questionnaires were completed by 234 (93.6%) of 250 children who were approached. The mean age of the children was 14.3 (range 13-15 years). 70 (29%) were girls and 141 (60%) were boys; 23 (9.8%) did not fill in the personal details. 12 girls had driven a car or bike, of which 6 always, 4 sometimes and 2 never had driven without a helmet/seat-belt. 66 boys had driven a car or bike of wh...

The development of new protective systems must be performed on reliable tools and representative of alive human. In an earlier study a simplified and realistic model of the head-neck system under moderate rear impact was performed. It is clear and often addressed in the literature that under such an impact configuration, the deformation of the torso and the car seat, is of extreme importance an...

A six-month study into the effect of a substantial programme of integrated health education promoting the use of seat belts showed no major change in the rates for occupants of front seats, which remained around 35%. Though there were increases of up to 5% in the rates for wearing seat belts immediately after the multimedia campaigns which achieved high penetration, only those among women drive...

P olicy measures, including legislation, are one method of promoting health. Participation in many voluntary health promoting behaviours is strongly socioeconomically patterned, and this may also apply to behaviours governed by legislation. Rear passenger seat belt use is one legally prescribed behaviour—having been made compulsory in the UK in 1991. Previous research on the socioeconomic distr...

This work is a preliminary study which focused on subjective improvements of vehicle interior noise by using active noise control techniques. A local active noise control system has been mounted inside a room in order to reduce synthesized and real engine noise in the area around the headrest of a typical car seat. Recordings before and after cancellation have been made using a Head Acoustics m...

The patient is a factory programme engineer, on duty as a Lieutenant Commander R.N.R., who at the age of 41 was serving his annual training in H.M.S. Venturer, which called at Oporto, Portugal. He had apparently intended to stay aboard on 17th August, 1965, but two officers of H.M.S. Thames alongside had hired a self-drive car and offered him the front passenger seat, which he accepted. The car...

T here is a clear analogy between smoke detectors and child car seats. Both technologies have been enthusiastically embraced, and their widespread distribution has saved many thousands of lives. However, the issue of car seat misuse has led to a reevaluation of engineering and educational approaches for child occupant protection. It is time for a similar comprehensive reevaluation of smoke dete...

It is generally accepted today that the cervical spine of a car occupant who is involved in a low-speed rear end impact may suffer from soft tissue neck injuries leading to long-term impairment. Therefore, to assess the risk of sustaining such injuries is a major issue in traffic safety, and various neck injury criteria are being discussed for this purpose. In this study a new candidate for suc...

The severity of injuries sustained by 2577 car occupants in road traffic accidents in the catchment area of one district accident service during February 1982 to January 1984 inclusive was assessed using the injury severity score system. In the first 12 months the mean injury severity score for front seat occupants injured in a road traffic accident was 4.94 and in the second 12 month period, a...