SN 640 578
Emission
The A-weighted sound power level LW,i of a parking lot according to SN 640 578 (edition 2006-07) calculates from SN640-2006:
\(L_{W,i}=L_{W,PVi}+dM_i\)
with
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LW,PVi: sound power level per movement and hour of a parking lot type with area i, in dB(A)
-
dMi: traffic correction, in dB
In CadnaA, an initial sound power level of LW,PV=66 dB(A) is used in conjunction with a correction for the type of parking lot KPA (see below):
\(L_W,i=66dB(A)+K_{PA,i}+dM_i\)
The traffic correction results from:
\(dM_i=10\lg(B_{Teilfläche,i} * n_{Teilflänche,i})\)
with
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Bsub area i: number of events on sub-area i per hour (for Day/Night separately)
-
nsub area i: number of parking spaces on sub-area i
Direct Input
For direct input specify the emission level L*m,E (dBA) (individually for the time periods Day/Evening/Night). The value results from sound power level PWL (dBA) according to:
\(L^*_{m,E}=L_{wA}-17dB-19.2dB\)
Parking Lot Type
| Attribute Value PARTNR | Parking Lot Type | LW,PV dB(A) | Correction for Parking Lot Type DPA in CadnaA dB *3) | Level Correction for Shopping Trolleys *4) |
| 1 | Commercial Traffic | 66 | 0 | 2 |
| 2 | Park and Ride | 66 | 0 | 2 |
| 3 | Service Provider | 66 *1) | 0 | 2 |
| 4 | Shopping Traffic | 67 *1) | 1 | 2 |
| 5 | Leisure Activities | 68 *1) *2) | 2 | 2 |
| 6 | Residents and Visitors | 67 *1) | 1 | 2 |
| 7 | Waiting and Assembly Areas | 68 *1) *2) | 2 | 2 |
| 8 | Miscellaneous | 67 *1) | 1 | 2 |
| 9 | Cars | 76 | 10 | 1 |
| 10 | Trucks | 78 | 12 | - |
| 11 | Motorcycles | 69 | 3 | - |
*1) The sound power level includes noise due to door and hatch slamming.
*2) The sound power level includes noise due to car radios.
*3) with reference to the initial sound power level of LW,PV= 66 dB(A)
*4) The level correction for the use of shopping trolleys has to corrected for in CadnaA manually by the user via the correction for the parking lot type Dp.
Search/Passage of Vehicles
When calculating the immission level the noise due to search and passage of vehicles is accounted for automatically by:
\(N<150 : K_P=10\lg(1+\frac{N}{44})dB\)
\(N\geq150 : K_P=6.4 dB\)
Passage of Vehicles
The noise due to the passage of vehicles is modeled using the object „Road“. According to SN 640 578 a velocity of 30 km/h has to be used.
Entry & Exit Noise
The noise due to cars entering and leaving the parking lot is not considered in CadnaA.
Note
When using SN 640 578, a event in the input dialog refers representatively to a parking operation „Parkierungsvorgang“ (SN 640 578 paragrah 5.9).
Note
The implementation in CadnaA only refers to the modeling of so-called „uncovered parking lots“ according to SN 640 578. The other noise sources specified in this standard (underground car park, parking garage) are not implemented.