Indoor and Outdoor Sound Levels

                                                        Sound                  Sound                  

                                                      Pressure                 Level                   

Outdoor Sound Levels                    (mPa)                    (dBA)                 Indoor Sound Levels           

                                                    6,324,555     -           110                     Rock Band at 5 m

Jet Over-Flight at 300 m                                  -           105

                                                    2,000,000     -           100                     Inside New York Subway Train

Gas Lawn Mower at 1 m                                 -            95

                                                      632,456      -            90                      Food Blender at 1 m

Diesel Truck at 15 m                                       -            85

Noisy Urban Area--Daytime        200,000      -            80                      Garbage Disposal at 1 m

                                                                         -            75                      Shouting at 1 m

Gas Lawn Mower at 30 m             63,246       -            70                      Vacuum Cleaner at 3 m

Suburban Commercial Area                            -            65                      Normal Speech at 1 m

                                                       20,000       -            60              

Quiet Urban Area -- Daytime                          -            55                      Quiet Conversation at 1m

                                                        6,325        -            50                      Dishwasher Next Room

Quiet Urban Area--Nighttime                         -            45

                                                        2,000        -            40                      Empty Theater or Library

Quiet Suburb--Nighttime                                 -            35

                                                         632          -            30                      Quiet Bedroom at Night

Quiet Rural Area--Nighttime                          -            25                       Empty Concert Hall

Rustling Leaves                               200          -            20

                                                                         -            15                       Broadcast and Recording Studios

                                                          63           -            10              

                                                                         -             5

Reference Pressure Level                 20           -             0                        Threshold of Hearing

Notes:

      mPa - MicroPascals describe pressure levels (force/area).