A study conducted by researchers at the University of Maryland School of Medicine and the University of Maryland Medical Center has found that the number of pedestrians killed or injured in traffic accidents while wearing headphones tripled over a six-year period beginning in 2004. The researchers examined records of accident reports maintained by online news archives like Google and Westlaw, as well as data obtained from the U.S. Consumer Product Safety Commission (CPSC) and the National Electronic Injury Surveillance System (NEISS). The study was published in the January 16, 2012 online edition of the medical journal Injury Prevention.
The study identified 116 reported injuries or fatalities of pedestrians wearing headphones. They found that sixty-eight percent of the victims were male. Sixty-seven percent were under thirty years old. Fifty-five percent of the vehicles involved were trains, while most of the rest were automobiles. Only seventy-four percent of the reports explicitly stated that the victim was wearing headphones at the time of the accident. The remainder of the reports noted that the vehicle honked or sounded some sort of warning before the accident, suggesting that the pedestrian could not hear the warning. Seventy percent of the pedestrian accidents reviewed by the researchers resulted in the pedestrian’s death.
The number of pedestrians injured or killed in traffic or train accidents while wearing headphones tripled during the time period reviewed by the researchers. They found that sixteen injuries or deaths occurred in 2004, the first year reviewed. The last year reviewed, covering the period from 2010 to 2011, had forty-seven such accidents.
Two primary risks associated with headphone use by pedestrians became clear from the statistics. First is the risk of distraction, causing a pedestrian not to notice an imminent threat like an approaching car or train. The other is what the authors called “sensory deprivation,” or the inability of the pedestrian to hear an approaching vehicle or its warning sounds. The original inspiration for the study was reportedly the case of a Maryland teen who died after being struck by a train while crossing the tracks. Reports indicated the teen was wearing headphones and did not respond to warning sounds.