Columbus Answers: Why do intersections have different audible crosswalk signals?

What are you curious about, Columbus? If you've got a question about central Ohio, we'll do our best to look into the topic and let you know what we find! Why do some of the crosswalks Downtown make machine-gun noises and others bird noises when they give the walk signal? Of the thousand or so Columbus intersections that have traffic signals, 105 of them have audible crosswalk signals - the sounds that tell pedestrians with visual impairments that it's safe to cross the street.