it does not mean that there wasn t evidence found. but that leads to the next kind of obvious follow up question if it s so difficult to work out whether a shot has actually been fired on the ground, how does shotspotter know with such confidence that it s 97% accurate? on our ride along, i saw for myself. popping sound. shotspotter says this figure is accurate because the police officers themselves are able to listen to the noise recording and feed this back to them something they call ground truth. and that s part of the feedback that you are basing that figure on? absolutely yeah, that is the feedback. we rely on ground truth from agencies to tell us when we miss, when we miss detections or when we misclassify. other people have said about the general stat of 97% stat that it is not rooted in scientific rigour i.e., it has not been scrutinised, it hasn t been peer reviewed. do you think that is fair?
gun shots. shotspotter says this figure is accurate because the police officers themselves are able to listen to the noise recording and feed this back to them something they call ground truth. and that s part of the feedback that you are basing that figure on? absolutely yeah, that is the feedback. we rely on ground truth from agencies to tell us when we miss, when we miss detections or when we misclassify. other people have said about the general stat of 97% stat that it is not rooted in scientific rigour i.e., it has not been scrutinised, it hasn t been peer reviewed. do you think that is fair? it is so certainly a factor that there has not been an academic peer review of the service, but i would push back in saying that it is not been analysed it has been analysed for 20 years across 100 plus customers that are using it every single day. here s the problem with that often, it s pretty hard to tell whether a gunshot has been fired by simply listening to the audio.
times and what they are stating is that there is a 9% reported evidence of something being found. right. it does not mean that there wasn t evidence found. but that leads to the next kind of obvious follow up question if it s so difficult to work out whether a shot has actually been fired on the ground, how does shotspotter know with such confidence that it s 97% accurate? on our ride along, i saw for myself. popping sound. shotspotter says this figure is accurate because the police officers themselves are able to listen to the noise recording and feed this back to them something they call ground truth. and that s part of the feedback that you are basing that figure on? absolutely yeah, that is the feedback. we rely on ground truth from agencies to tell us when we miss, when we miss detections or when we misclassify. other people have said about the general stat of 97%
reported evidence of something being found. right. it does not mean that there wasn t evidence found. but that leads to the next kind of obvious follow up question if it s so difficult to work out whether a shot has actually been fired on the ground, how does shotspotter know with such confidence that it s 97% accurate? on our ride along, i saw for myself. popping sound. shotspotter says this figure is accurate because the police officers themselves are able to listen to the noise recording and feed this back to them something they call ground truth. and that s part of the feedback that you are basing that figure on? absolutely yeah, that is the feedback. we rely on ground truth from agencies to tell us when we miss, when we miss detections or when we misclassify. other people have said about the general stat of 97% that it is not rooted in scientific rigour
the inspector general of chicago said that they believe only 9% of dispatches there is any evidence of an actual gun crime or even a gunshot. how do you respond to that? i ve read this report a few times and what they are stating is that there is a 9% reported evidence of something being found. right. it does not mean that there wasn t evidence found. but that leads to the next kind of obvious follow up question if it s so difficult to work out whether a shot has actually been fired on the ground, how does shotspotter know with such confidence that it s 97% accurate? on our ride along, i saw for myself. popping sound. shotspotter says this figure is accurate because the police officers themselves are able to listen to the noise