Acoustic gunshot sensors come in different shapes and sizes. Some, like the Shotspotter, feature microphones that are installed up to 40 feet off the ground. The AmberBox detection system, on the other hand, looks like a smoke detector. But, in both cases, the devices alert security and first responders to indoor or outdoor shooting incidents. Whereas, fewer than 20 percent of shots fired are reported to the police, according to the researchers. CNBC recently reported that interest in the tech has spiked since the mass shooting in Las Vegas earlier this month, which saw a gunman kill 58 people and injure hundreds of others. However, the sensors have also faced criticism as a mode of surveillance, and over their effectiveness, and cost-efficiency.

The study analyzed the cases of 731 gunshot victims, of which 192 were identified with acoustic sensor tech. Compared to those found through conventional policing methods, sensor-linked patients were likely to have more severe wounds. They were also found to spend more days on mechanical ventilation, more time in the hospital, and were more likely to require an operation. Despite the severity of their injuries, these victims also experienced a similar mortality rate to the others.

The findings illustrate that "the use of gunshot sensor technology by police may help paramedics treat and transport these patients to the hospital more rapidly," said the study's lead author Dr. Magdalene Brooke. For now, the research is being treated as preliminary until it makes it into a peer-reviewed journal.