On-board Ambient Noise Monitor
Each saloon is equipped with an ambient noise monitor to detect the noise in the saloon, control loudspeaker gain, and compensate for noise to achieve good broadcast effect.
Product Features
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High Sensitivity
It can clearly capture sound signals.
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Wide Coverage
It can achieve wide - area sound coverage, ensuring that in every area, including every corner of the carriage, a sound can be detected.
Parameter Specifications
Noise Output：
0dB/1KΩ, ±2dB (Corresponding to 90dB noise)
Noise Channel Signal-to-Noise Ratio：
≥55dB
Noise Channel Frequency Response：
200Hz-10KHz≤±2dB
Weight：
≤1kg
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On-board Ambient Noise Monitor
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Passenger Emergency Intercom (Visual Intercom)
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Relevant Cases
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Line 1 in MexicoAs an important artery of urban transportation in Mexico City, Line 1 bears a large passenger flow every day. Beihai Communication has meticulously developed a Passenger Information System (PIS) for 29 newly built trains and 10 retrofitted trains on Line 1 of Mexico City. This system consists of three major subsystems: the Train Public Address (PA) system, the Passenger Information Display System (PIDS), and the Closed-Circuit Television (CCTV) system.MORE
