A common criticism of skateboarding is that it’s noisy. Check out this report from the Vancouver Coastal Health Authority, who recorded noise levels in Cathedral Square with and without 6 skateboarders doing their thing. The noise levels were raised less than 3dB with 6 skaters. The max noise level measurement with the skateboarders was 66.8 dB. That’s “moderate to quiet” according to the threshold of hearing diagram below. Skateparks are even quieter, since the concrete is smooth and there are no gaps to make wheels click.