The blog covers issues broadly related to sustainability in Minnesota and the world both from an environmental perspective and from an interpersonal perspective. It also covers issues related to mycology (the study of fungi) with a specific emphasis on the interaction with fungal organisms and buildings.
Cheap Trick at the North Dakota State Fair - July 26, 2018 - N. Carlson
Sound levels at rock concerts exceed the OSHA occupational exposure limit for noise exposure (90 dBA averaged over 8 hours). As the effect of hearing loss is irreversible, it is prudent to bring along hearing protection to these concerts. At the Cheap Trick Concert the drum was heavily miked. The beats on the base drum felt like chest compressions for CPR.
Rick Nielsen and his special guitar. - N. Carlson
How loud is too loud? Average exposure above 85 dBA over eight hours requires hearing protection. Sound level meter apps on phones are fairly good but they are not calibrated. As a rule of thumb, if you are in an environment where it is difficult for you to hear your finger snap at arms length, it is prudent to wear hearing protection. Many hearing protectors now come in metal cases that can be attached to a key chain. Some are also designed for better tone quality to hear music at concerts.
These Ear Peace ear plugs worked well with three colored inserts that provide varying levels of hearing protection. The metal key chain case allows for the storage of the three ear pieces in one compartment and the inserts in another.
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