Correction, March 3rd: This post originally included a video that said Amazon’s drones exceed 71db of noise. The video was a “simulation” created by a resident, measuring a chainsaw. Amazon spokesperson Sam Stephenson did not provide dB readings for the drones in question, but pointed to CNBC’s reporting of a separate city test of the drone that found it within the 47-61 dB range. Since then, Amazon introduced the MK30, which reduced the perceived volume by half, the company says.