I was curious how loud my apartment is. I live on a busy street. I waited until there was little to no traffic noise to do the test. I tried two iPhone apps.
|Category||Expected result||The free Decibel Meter app||The 99 cent DbVolume Meter|
|Inside my apartment||35-45||55-60||44-46|
|On my terrace (mild honking)||50-60||75-80||50-60|
|My normal speaking voice back inside||50-60||75-85||50-55|
|My voice when projecting back inside (like giving a speech or on the phone)||60-70||90-100||57-60|
Guess the free one is free for a reason. It’s highly inaccurate! All in all, an interesting experiment.