According to the CDC, hearing damage can occur after one minute of exposure to a siren, compared with two hours of exposure to a leaf blower.
Sources
- CDC Telebriefing: New Vital Signs Report - Too loud! For Too long! (archive.cdc.gov)
- https://www.ovid.com/jnls/thehearingjournal/fulltext/10.1097/01.hj.0000516772.30916.b8~noise-induced-hearing-loss-what-your-patients-dont-know-can (ovid.com)
- https://www.acsh.org/news/2017/03/21/leaf-blowers-threats-hearing-signal-springs-return-11034 (acsh.org)
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