PPE performance
https://invc.com/noise-assessment/how-reduce-hearing-damage-risk-at-negligible-cost/
https://www.hse.gov.uk/research/rrhtm/rr720.htm
https://eave.io/construction-companies-to-mandate-active-hearing-protection-with-noise-monitoring/
Noise control
https://www.hse.gov.uk/noise/casestudies/index.htm
https://www.cdc.gov/niosh/docs/79-117/
https://www.who.int/occupational_health/publications/noise10.pdf
https://invc.com/noise-control/top-10-noise-control-techniques/
https://invc.com/resources/noise-control-case-studies/
https://invc.com/noise-control/remote-noise-control-by-email/
Health surveillance
https://www.hsl.gov.uk/media/363516/nhca%20workshop%20presentation%20ac.pdf
http://www.hse.gov.uk/noise/OAE-expert-symposium-paper-jan-2012.pdf