American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 114)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-109 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

A. Automatic gain adjustment of the PA subsystem shall be provided based upon

ambient noise levels. The controller shall provide a graduated increase in power

output in proportion to the increase in noise level from a preset quiet level.

As an alternative to AGC, additional speakers can be added to provide better

coverage.

B. The adjustment range for ambient noise shall be a minimum of 20 dB but shall

never result in a sound level .greater than 100 dB as measured 8 feet above the

surface.

C. Independent automatic gain or level control shall be provided at each passenger

station for the public areas. Automatic level control shall also be provided,

independently, for the high-bay machine shop areas and the outdoor track area

in the Yard and the high-bay machine shop in the Maintenance-of-Way-Building.

Automatic level control will not be required for office zones or equipment rooms.

D. Noise sensing devices for each controlled area shall be mounted in loudspeaker

enclosures.

9.8.2 Visual Message Signs

9.8.2.1 General

The Visual Message Sign (VMS) System is a subsystem of TPIS shall provide visual

information at selected locations in passenger stations and auxiliary areas. The

display of the visual information shall be in compliance with the ADA Accessibility

Guidelines (ADAAG) for the hearing impaired, operational and safety-related

messages for patron awareness (refer to ADAAG 4.30, DOT 49 CFR parts 27, 37

and 38, and the CalDAG-California Disabled Accessibility Guidebook for guidance).

The generation of messages for display at each passenger station shall be provided

in both preprogrammed format and real time terminal input. As a minimum, these

communications shall be provided on the platforms and mezzanine areas of all

stations, at fare vending areas, and at underground entrances.

The VMS shall provide centralized message generator (including message creation,

storage and selection), and dispatch functions at the ROC for individual stations,

groups of stations, and all station sign activation and display. Each passenger

station VMS/TIS shall accept message inputs from both a centralized processing

unit located at the ROC and from local passenger station inputs. Passenger station

inputs consist of pre-programmed messages emulating the pre-programmed public

announcements activated from the passenger station's Emergency Management

Panel and from train control/signaling system equipment.

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 190 191

Keine Kommentare

American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 114