1. Project Background and Core Requirements

Xuzhou Le Station, Shangqiu Station, Hangzhou Station, and Beihai Station respectively handle passenger transport tasks for East China, Central China, and South China, with peak passenger flows reaching tens of thousands. Their core audio system requirements are as follows:

• The coverage area is extensive, encompassing multiple areas including waiting halls, ticket gates, platforms, transfer passages, and ticket offices, with a total area exceeding one million square meters.

• Voice transmission must be accurate, and train ticket inspection notices, delay information, safety reminders, and other content must be clearly identifiable. In emergencies, it should be able to link with the emergency system and prioritize the broadcast of early warning information.

• It must operate stably and reliably, and adapt to different regional climates, such as the high temperature and humidity at Beihai Station and the plum rain season at Hangzhou Station, to ensure 24/7 trouble-free operation.

• The sound quality should be excellent, and while ensuring the functionality of the announcements, the background music should be soft and not harsh to enhance the comfort of passengers while waiting for their trains.

2. Core Technologies and Innovations

2.1 Global Digital Audio Network

Employing fully digital audio transmission technology compliant with the DANTE/AES67 standard, it achieves synchronous transmission of audio signals, power, and control commands via a single network cable. Compared to traditional analog systems, this reduces wiring by 80%, lowering installation difficulty and cost, while avoiding signal attenuation and interference during transmission, ensuring consistent audio quality across all areas.

2.2 Adaptive Climate Power Amplifier System

Customized Class D adaptive power amplifiers were developed to address the unique climate characteristics of different high-speed rail stations. At Beihai Station, the amplifier features a moisture-proof and rust-proof coating and high-temperature protection; at Hangzhou Station, dual protection mechanisms against short circuits and overloads were added. This system can detect the audio load in each area in real time and automatically adjust the power output, achieving energy efficiency more than 35% higher than traditional power amplifiers while ensuring sufficient volume.

2.3 Scenario-based customized speaker combinations

Dedicated speakers are selected based on the function and environment of different areas in the high-speed rail station, with the following specific configurations:

All speakers are acoustically optimized to ensure speech intelligibility even in noisy environments, while also meeting the sound quality requirements for background music.

3. Performance advantages of the solution

• Ultra-high voice clarity : Equipped with professional noise reduction and voice enhancement algorithms, the voice intelligibility test reaches over 92% in noisy areas such as waiting halls, ensuring that passengers can clearly obtain key information.

• Extreme system stability : Key equipment adopts a dual-machine redundancy design, such as power amplifiers and core controllers. In case of failure, automatic switching can be performed with a switching time of less than 0.5 seconds, ensuring uninterrupted system operation.

• Convenience of intelligent operation and maintenance: Equipped with a remote monitoring platform, technicians can view the operating status of each device in real time via computer or mobile phone, such as power, temperature, signal strength, etc., supporting remote fault diagnosis and repair, reducing the frequency of on-site maintenance and lowering operation and maintenance costs.

• Flexible scalability : Based on the IP network architecture, when a high-speed rail station is expanded or new areas are added, there is no need to lay new trunk lines. The audio system can be expanded simply by adding terminal equipment and connecting it to the existing network.

• Strong environmental adaptability : Through special materials and protective design, the equipment can adapt to different climatic environments such as high temperature, high humidity, low temperature, and dusty conditions, ensuring stable operation under various extreme conditions.

4. Implementation and Service Support

• Personalized design solutions : For each high-speed railway station, a dedicated design team is formed to conduct on-site acoustic mapping based on the building structure, passenger flow, and climate conditions, and to develop a customized audio system solution to ensure that the equipment layout and functions meet actual needs.

• Strict quality control : All products have passed ISO9001 quality management system certification, 3C mandatory certification and industry-specific testing. Before leaving the factory, they undergo 72 hours of continuous operation testing to ensure that the product quality meets the standards.

• Professional installation and debugging : On-site installation is handled by an engineering team with over 10 years of experience in audio projects for transportation hubs. After installation, sound field calibration is performed to ensure uniform volume and clear speech in all areas, achieving the best listening effect.

• Long-term after-sales service : We provide a 5-year warranty period, during which faulty equipment will be replaced free of charge; we have established a 24-hour emergency response mechanism, and after receiving a fault report, we will provide a solution within 1 hour and arrive at the site within 48 hours (72 hours for remote areas); we conduct regular equipment inspections and maintenance guidance to ensure the long-term stable operation of the system.

Conclusion

The audio solutions developed for Xuzhou Le Station, Shangqiu Station, Hangzhou Station, and Beihai Station integrate digital transmission, adaptive climate technology, and customized scenario design. They not only meet the stringent requirements of high-speed rail stations for audio system functionality, stability, and adaptability, but also enhance the passenger waiting experience by optimizing sound quality. The successful implementation of this project demonstrates the company's technical strength and service capabilities in the field of audio systems for large transportation hubs. It has accumulated valuable experience for participating in more regional high-speed rail stations and other transportation hub audio projects, and also provides a reference technical standard for the construction of audio systems in the transportation industry.