www.solerpalau.com
 
 
 
 
 
  TOOLS
 
 
 
  EasyVent  
 
 
 
  Conversion measurements and charts  
 
 
 
  Conversion of units  
 
 
 
Formulae and related details  
 
 
 
    Capture of contaminated air
 
 
 
    Commercial premises: air renewal
 
 
 
    Speeds
 
 
 
  Noise
 
 
 
 
  FORMULAE AND RELATED DETAILS
 
  NOISE
 
 
Types
 
 
 
  NPS  
Noise dB Examples
Deafening 120
 
110
 
 
100
 
 
90
 
 
80
 
 
70
 

60
 
 
 
50
 
 
40
 
 
30
 
 
20
 
 
10
 
 
0
Thunder
Canon trigger
Tyre blowout
Steam whistle
Large industrial unit
Strong Train in a tunnel
Street with very dense traffic
Very noisy factories
Plane control cabin
Loudspeakers
Very strong Noisy office
Suburban railway
Typewriter
Full volume radio
Average workshop
Moderate Large shop
Average office
Silent automobile
Quiet office
Average dwelling
Smooth Public library
Country road
Quiet conversation
Rustle of paper
Human whistle
Very gentle Quiet church
Silent night in the country
Soundproof room
Sensitive hearing limit
 
Attenuation
 
 
 
Attenuation of the noise over the distance to the fan in open space.
 
Distance to the source of noise m Attenuation dB (A)
1 11
1,5 14,5
2 17
3 20
4 23
5 25
6 26
7 28
8 29
9 30
10 31
15 34
20 37
25 39
30 40
 
 
 
 
 
 
 
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