Jaga Nagrzewnice
Jaga Nagrzewnice
Jaga Nagrzewnice
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<strong>Jaga</strong> AVS ® Unit he ate r _Cor re c tion f ac tor s sound<br />
Noise sources<br />
The noise level<br />
Combination of different noise sources at the same sound level<br />
15 db(A)<br />
177<br />
5.00 m<br />
4.50 m<br />
Increase of sound level<br />
10<br />
7<br />
5<br />
Unit heater<br />
Sound measuring in a room in accordance to (DIN) EN 23741 and 23742<br />
The information regarding the noise level of the unit heaters is applicable<br />
in case of a full air flow at a distance of 5 m high and 4.5 m sideways<br />
from the equipment, in a room without reflection, in accordance to DIN<br />
23741 and 23742.<br />
These values are approximate values for a free air inlet and outlet flow,<br />
which may be strongly influenced by the conditions of the installation<br />
of the equipment and the heated room.<br />
0<br />
1 2 5 10<br />
20 25<br />
Number of noise sources at same level<br />
Example:<br />
- given: 5 sound sources of each 53 db(A)<br />
- asked: the total sound intensity<br />
- the total sound intensity: 53 db(A) + 7 db(A) = 60 db(A)<br />
ex.: the value of a room with partial reflection is around 4 dbA higher.<br />
Combination of different noise sources with different sound levels<br />
3 db(A)<br />
Increase of sound level<br />
2 db(A)<br />
1 db(A)<br />
0 db(A)<br />
1 4<br />
6<br />
8 12 16 20 24<br />
Level difference of 2 noise sources<br />
Example:<br />
- given: 2 sound sources 53 dbA and 59 db(A)<br />
- difference = 6 db(A)<br />
- asked: the total zound intensity<br />
- the total sound intensity : 59 db(A) plus 1 db(A) = 60 db(A)
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