Source Sound Sound Sound Pressure Pressure Power Level Intensity prms [Pa] Lp I [dB] [W/m2] Imperceptible <0 <2010-6 <10-12 Modern air 30 0.610-3 10-9 conditioning / computer Normal 40 210-3 10·10-9 conversation (at 1 m) Maximum 50 610-3 0.1·10-6 allowed sleep disturbance Maximum 70 0.06 10·10-6 allowed daytime disturbance (rock 100 2 0.01 concert) Accelerating 110 6 0.1 motorcycle Jet engine at 120 20 1 take-off (receiver at 100 m) Pain / 130 63 10 pneumatic hammer at 1 m Jet engine at 140 200 100 3 m / Siren at 10 m Damage 150 630 1000 (irreversible) Rocket 165 3600 31·103 launch equipment acoustic tests Shuttle 190 63 000 10·106 launch* *Largest man-made continuous sound (130 dB at 3 km, 100 dB at 40 km; Orlando is 84 km West KSC). In terms of frequency, the human ear has a sensitivity range of 3 orders of magnitude (from 20 Hz to 20 kHz), usually divided in octaves; an octave is the frequency interval between one sinusoidal waves and another with half or double its frequency (i.e. there are 10 octaves in the 20 Hz to 20 kHz range).
Source Sound Pressure Level Lp [dB] Sound Pressure prms [Pa] Sound Power Intensity I [W/m2] Imperceptible <0 <2010-6 <10-12 Modern air conditioning / computer 30 0.610-3 10-9 Normal conversation (at 1 m) 40 210-3 10·10-9 Maximum allowed sleep disturbance 50 610-3 0.1·10-6 Maximum allowed daytime disturbance 70 0.06 10·10-6 (rock concert) 100 2 0.01 Accelerating motorcycle 110 6 0.1 Jet engine at take-off (receiver at 100 m) 120 20 1 Pain / pneumatic hammer at 1 m 130 63 10 Jet engine at 3 m / Siren at 10 m 140 200 100 Damage (irreversible) 150 630 1000 Rocket launch equipment acoustic tests 165 3600 31·103 Shuttle launch* 190 63 000 10·106 *Largest man-made continuous sound (130 dB at 3 km, 100 dB at 40 km; Orlando is 84 km West KSC). In terms of frequency, the human ear has a sensitivity range of 3 orders of magnitude (from 20 Hz to 20 kHz), usually divided in octaves; an octave is the frequency interval between one sinusoidal waves and another with half or double its frequency (i.e. there are 10 octaves in the 20 Hz to 20 kHz range).