85B.5 - EXCESSIVE NOISE EXPOSURE.
85B.5 EXCESSIVE NOISE EXPOSURE.
1. An excessive noise exposure is sound which exceeds the times
and intensities listed in the following table:
Duration Sound level, Duration Sound level,
per day dBA slow per day dBA slow
hours response minutes response
8 90 52 106
7 91 45 107
6 92 37 108
5 93 33 109
4 1/2 94 30 110
4 95 26 111
3 1/2 96 22 112
3 97 18 113
2 1/2 98 16 114
2 1/4 99 15 115
2 100 No exposure greater
1 3/4 101 than 115 permitted
1 1/2 102
1 1/4 103
1 1/8 104
1 105
2. The workers' compensation commissioner may promulgate rules
pursuant to chapter 17A to amend this table based upon changes
recommended in nationally recognized consensus standards.
3. An employer shall immediately inform an employee if the
employer learns that the employee is being subjected to sound levels
and duration in excess of those indicated in the above table. In
instances of occupational hearing loss alleged to have occurred,
either in whole or in part prior to January 1, 1981, an employer
shall provide upon request by an affected employee whatever evidence
is available to the employer of the date, duration, and intensities
of noise to which the employee was subjected in employment. Section History: Early Form
[C81, § 85B.5] Section History: Recent Form
98 Acts, ch 1061, § 11; 98 Acts, ch 1160, §3; 2009 Acts, ch 41,
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