American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 40

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METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS
DE304.09 9-35 Revision 4: 05/09/12
Metro Baseline Re-Baseline: 04/29/10
Figure 2a (vertical) and Figure 3a (horizontal) of ISO 2631-1987 (E) as specified
in individual procurement specifications.
W. Noise
Average noise levels emanating from a married pair or a single articulated car
shall not exceed the following levels (with all auxiliary equipment operating
simultaneously) at a distance of 50 feet from each side of the car at 5 feet above
ground plane using fast meter response.
1. Vehicle Stationary Empty: 65 dBA
2. Vehicle empty, on tangent track, and accelerating from 0 to 40 MPH, or
maximum electric braking or maximum friction braking from 40 MPH
(whichever is worse): 77dBA
Equipment that operates for durations of less than two seconds, such as
dump valves or contractors shall not exceed 85 DBA when measured 16 feet
from car centerline using the fast meter response.
The interior noise level of the vehicle in motion and with all subsystems
operating shall not exceed 72 dBA. For the stationary vehicle, the interior
noise level for similar conditions shall not exceed 68 dBA.
X. Climate
The vehicles shall be capable of being operated at the specified performance
levels, and stored/maintained without temporary or long-term impairment
resulting from natural or induced environments in which the Authority intends to
operate the vehicle.
Refer to Section 2, Environmental Considerations for environmental factors to be
used as design guidelines.
Y. Lighting
External lighting on light rail vehicles shall be in accordance with CPU G.O. 143
B, 5.01 and 5.02.
Operations at higher speeds, or on curves, will produce higher sound levels.
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