Our office parking lot is within 300 feet of the Little Miami River in Milford (east side of Cincinnati for you out-of-towners) with MANY trees. I used a Quest model M 27 logging noise dosimeter to monitor their "singing" :rofl: . The volume rises and falls with a 7 to 9 second interval between peaks (average is 8 sec) with peak (1 second interval) of 89.9 dBA and a minimum of 80 dBA. It appeared that ever 6th or 7th "peak" was loudest. Average peaks were around 87.7 to 88.6 dBA. The recorded maximum peak level (50 millisecond window) was 90.5 dBA.
For those of you not in the know, OSHA requires hearing protection if you are exposed to 90 dBA in the work place. Being outside in parts of Cincinnati is an OSHA violation.
For those of you not in the know, OSHA requires hearing protection if you are exposed to 90 dBA in the work place. Being outside in parts of Cincinnati is an OSHA violation.
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