Sound Intensity/SIL
uSound Source                         Intensity/SIL
uCity traffic                                                       10-5   = 70 dB
uNormal conversation at 1 m                         10-6   = 60 dB
uOffice; Classroom; Quiet auto interior        10-7   = 50 dB
uLibrary                                                             10-8   = 40 dB
uEmpty auditorium; City street, no traffic   10-9   = 30 dB
uWhisper at 1 m                                                10-10 = 20 dB
uRustle of leaves; Falling pin                          10-11 = 10 dB
uLimit of audibility                                          10-12  =   0 dB