Great reaction

This app works well even on quiet rooms. I got just under 40 dB in a bedroom and was impressed to see the reaction from distant traffic and nearby birds.
Loud noise did produce over 115 dB so it seems to work well in my iPhone 4 even with Mophie case on or off.

Now I would like to see a savable graph added for permanent readings.

pdvdg about Decibels: dB Sound Level Meter, v1.0