What is OSHA's exchange rate for noise exposure?

The correct choice reflects OSHA's regulation regarding noise exposure, which indicates that for every increase of 5 dB in sound level, the permissible exposure time is cut in half. This means that if a worker is exposed to a noise level of 90 dB for a certain duration, they would only be allowed to be exposed to a noise level of 95 dB for half that duration to prevent hearing damage.

Understanding this exchange rate is crucial for professionals involved in occupational health and safety, as it helps in assessing workplace noise levels and implementing necessary measures to protect workers’ hearing. This regulation is based on evidence that higher sound levels can have a significantly detrimental effect on hearing, hence the stricter limits as sound levels increase.

In contrast, the other options present different exchange rates that do not align with OSHA's established guidelines. Therefore, they would not be applicable when determining permissible noise exposure levels in the workplace according to OSHA standards.