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Noise Levels - how loud is loud?

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dBA Example Home & Yard Appliances Workshop & Construction
0 healthy hearing threshold
10 a pin dropping
20 rustling leaves
30 whisper
40 babbling brook computer
50 light traffic refrigerator
60 conversational speech air conditioner
70 shower dishwasher
75 toilet flushing vacuum cleaner
80 alarm clock garbage disposal
85 passing diesel truck snow blower
90 squeeze toy lawn mower arc welder
95 inside subway car food processor belt sander
100 motorcycle (riding) handheld drill
105 sporting event table saw
110 rock band jackhammer
115 emergency vehicle siren riveter
120 thunderclap oxygen torch
125 balloon popping
130 peak stadium crowd noise
135 air raid siren
140 jet engine at takeoff
145 firecracker
150 fighter jet launch
155 cap gun
160 shotgun
165 .357 magnum revolver
170 safety airbag
175 howitzer cannon
180 rocket launch
...
194 sound waves become shock waves

The list below gives you an idea of how noticeable a change in decibel level is:

1dB – Not noticable

3dB – Barely noticeable

5dB – Clearly noticeable change

10dB – About twice as loud

20dB – About four times as loud