The opening ceremony of the 2023 staff training program of China State Railway Group was recently held in the press hall of Zhuzhou Railway Institute. To ensure the ceremony ran smoothly, the press hall needed an audio system that was efficient, convenient, secure and stable — one able to reproduce each speaker’s natural voice faithfully and deliver clear sound to every seat in the room.
Project Challenges
For the upgraded press hall, the institute set out three requirements:
- Audio clarity. The system had to deliver clear, high-fidelity sound so that the audience could hear every detail of the speakers’ remarks.
- Multi-speaker discussion. The press hall regularly hosts multi-party discussions and meetings, so the system had to support several speakers at once with every voice clearly conveyed.
- System stability. The audio system had to remain stable during long sessions, without dropouts, noise or other technical issues.
The Solution: Relacart TDN1
After careful evaluation and comparison, Zhuzhou Railway Institute chose the Relacart TDN1 network digital microphone as the core of its audio solution.
TDN1 is a desktop microphone base with built-in Dante networking, designed for quick installation of gooseneck microphones with 3-pin XLR female output. Different microphone poles can be fitted to suit different speaking scenarios, and the low-profile base sits flat on the table to provide high-quality sound pickup for meetings, distance learning and other applications.
Key specifications of the TDN1:
- Frequency response: 20–20,000 Hz; low-cut filter at 150 Hz, 18 dB/octave
- Gain adjustment: 6 selectable levels; input impedance 2.2 kΩ
- Signal-to-noise ratio: 65 dB (1 kHz at 1 Pa); max input level 0 dBu @ +20 dB gain
- Powered via PoE (IEEE 802.3af), consumption 2.3 W; 48 V DC phantom power for the microphone
- Dante network: RJ45 connector, CAT5 or CAT6 cable at 100 Mbps or above; standard Ethernet output
- Microphone socket: 3-pin XLR; weight 720 g
Project Results
In actual use, the press hall at Zhuzhou Railway Institute now enjoys stable audio transmission and clear sound. The professional audio system has been highly praised, and the institute’s staff are very satisfied with its performance. Drawing on 32 years of engineering experience since its founding in 1994, Relacart continues to accumulate valuable project know-how that informs the design of future audio systems.
