| Decibel (dB) |
Degree |
Sound quality |
Example |
Degree of perception |
|
0 |
|
|
|
|
|
10 |
Normal |
The smallest weak sound |
Broadcasting studio
Sound of wall clock |
Completely understand the smallest murmuring sound |
|
20 |
|
30 |
Mild |
Quiet
conversation |
At the library
Big sound of cricket |
Understand or cannot understand what the others say |
|
40 |
|
50 |
Moderate |
Normal conversation |
Sound of car runs
Noisy of factory |
Just nearly understand the normal conversation |
|
60 |
|
70 |
Severe |
Loud conversation |
Noisy restaurant
Dialogue on bus
Noisy factory |
Nearly understand when loudly speak |
|
80 |
|
90 |
Profound |
Big sound from 30 meter distance |
Noisy when the train passes
Largest sound of piano and trumpet |
Nearly to feel the loud sound but cannot understand |
|
100 |
|
110 |
Most profound (Deaf) |
Sound shouting near to the ear |
Propelling sound of the airplane
Jet engine sound |
Nearly to feel the big sound |
|
120 |
