Question
1. The level of sound pressure at the workplace from separate sources Formula With substituted values Result L r1 = L 1 - 10 lg
1. The level of sound pressure at the workplace from separate sources
Formula | With substituted values | Result |
Lr1= L1- 10 lg (1/2 r12)= | ||
Lr2= L2- 10 lg (2 r22)= | ||
Lr3= L3- 10 lg ( r32)= | ||
Lr4= L4- 10 lg ( r42)= |
2. Total sound power level of all groups of noise sources:
- by the formula
Lsum=10lg(100,1Lr+...+100,1Lr)= |
- by the nomogram
| Llarger - Llower = (specify value) | The difference of values Llarger - Llower | L |
3. Average value Lsum=10lg Lsum=
INITIAL DATA FOR THE NOISE EVALUATION
|
Variant | Sound levels Li, dBA coming to the workplace from each individual noise source and the corresponding distance ri by the noise source number | ||||||||
1 | 2 | 3 | 4 | ||||||
L1 | r1 | L2 | r2 | L3 | r3 | L4 | r4 | ||
9 | 85 | 8 | 60 | 0,9 | 80 | 2 | 80 | 4 | |
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Income Tax Fundamentals 2013
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
31st Edition
1111972516, 978-1285586618, 1285586611, 978-1285613109, 978-1111972516
