I opened this great little app at my ear doctor appointment and the hearing specialist said she had it too and thought it was remarkably accurate. I have learned a lot by using it and hope what I have learned will preserve my hearing into old age! (I measured this last summers Cicada onslaught peaking at 89 dB(A)!)
friendly shopper about Decibel X:dB Sound Level Meter, v5.0.0