HD2010UC
- 124 -
V4.2
Total L
eq
calculated by measuring partial L
eq
If you need to get the total L
eq
after measuring partial L
eq
, you can use the formula:
∑
⋅
⋅
=
n
L
i
eq
i
eq
T
T
L
1
10
10
,
10
log
10
where
∑
=
n
i
i
T
T
Example:
Let’s suppose we measured:
L
eq,1
= 80 dB over 1 h.
L
eq,2
= 90 dB over 2 h.
L
eq,3
= 50 dB over 5 h.
t
1
t
2
t
3
L
1
L
2
L
3
+
+
⋅
+
⋅
+
⋅
⋅
=
3
2
1
10
3
10
2
10
1
10
,
3
,
2
,
1
,
10
10
10
log
10
T
T
T
T
T
T
L
eq
eq
eq
L
L
L
T
eq
L
eq,1
, L
eq,2
, L
eq,3
partial equivalent levels.
T
1
, T
2
, T
3
integration times of partial equivalent levels.
L
eq,T
total equivalent level.
In the example: T = 1 h + 2 h + 5 h = 8 h.
The result is::
dB
2
.
84
8
10
5
10
2
10
1
log
10
L
5
9
8
10
T
eq,
=
⋅
+
⋅
+
⋅
⋅
=
Содержание DeltaOHM HD2010UC
Страница 2: ...HD2010UC 2 V4 2 ...
Страница 98: ...HD2010UC 98 V4 2 RIGHT Keypad The RIGHT key moves rightwards the cursor or the two active cursors flashing ...
Страница 129: ...HD2010UC 129 V4 2 NOTES ...
Страница 130: ...HD2010UC 130 V4 2 NOTES ...
Страница 131: ......
