Osha uses a 5 dba exchange rate, meaning that the allowed exposure time is cut in half for every increase in exposure of 5 dba. acgih and niosh recommend a 3 dba exchange rate because noise energy exposure actually doubles every 3 dba. osha explains the use of the 5 dba exchange rate as a means to account for the time during a workday that the employee is not exposed to noise, like breaks. imagine you are a safety officer who has to choose which exchange rate is preferable to use at your organization. discuss in your journal entry whether the 5 dba or the 3 dba exchange rate should be used for controlling occupational noise exposure.