Sound Intensity/SIL
	Sound Source                         Intensity/SIL City traffic                                                       10-5   = 70 dB Normal conversation at 1 m                         10-6   = 60 dB Office; Classroom; Quiet auto interior        10-7   = 50 dB Library                                                             10-8   = 40 dB Empty auditorium; City street, no traffic   10-9   = 30 dB Whisper at 1 m                                                10-10 = 20 dB Rustle of leaves; Falling pin                          10-11   = 10 dB Limit of audibility                                          10-12  =   0 dB