For sound insulation, we employed INSUL MARSHALL ACOUSTIC acoustic simulation design to accurately predict and achieve the cabin's sound insulation and acoustic environment. The design value, Rw+Ctr, reached 25dB (±5dB), while RT0.1s was controlled within ±0.1s.
For sound absorption, the interior materials also adhered to the INSUL MARSHALL ACOUSTIC acoustic simulation design. Polyester fibers cover 60% of the cabin's equivalent area to achieve broadband response. Furthermore, we applied a special process to localized material treatment to absorb 40% of the active reflected sound.
For sound insulation glazing, our freely assembled mobile soundproof cabin design goes beyond conventional safety glass and strives for higher standards.
Soundbox engineers paid special attention to the high-noise resonant vibration generated by the train compartment glazing during high-speed operation. After multiple physical material tests and comparisons, we identified materials with excellent sound insulation and safety performance, a choice that was fully recognized by the acoustic engineers. In terms of latch assembly, Soundbox engineers abandoned traditional structural assembly methods that relied on screws, nails, and glue. Leveraging precise SOLIDWORKS software mechanics modeling, we innovatively developed a method that uses only a single 90-degree latch to complete the cabin assembly.
A key feature of this public-use silent cabin is the tactile radar system. It constantly monitors cabin dynamics and uses the scanned data to send execution commands to the electronic control unit, intelligently controlling the on/off switching of the lighting and ventilation systems for energy conservation and safety management.
For the ventilation system, we utilize a labyrinth-style fresh air system that not only reduces acoustic interaction between the cabin and the outside world but also efficiently refreshes the cabin air within three minutes, providing a more comfortable environment for users.
The modular carpet design also prioritizes acoustic performance. We utilize a non-fluidized butyl rubber backing, a rubber-bonded PE staple fiber woven surface, and a contact-point ABS overhead underlayment. This not only meets the cabin's requirements for moisture resistance, mildew resistance, and easy cleaning and maintenance, but also successfully creates an acoustic model that absorbs, insulates, and reduces vibration. For the exterior, we selected a Korean-made nano-PP finish material that is resistant to friction, stains, UV rays, fire, and moisture. Not only does it come in a variety of colors, but it also blends effortlessly into any space and provides excellent protection for the cabin's sound insulation panels.
We also considered the connectivity needs between the cabin and external devices. We've reserved information connection holes for external wiring, conveniently used for recording, live streaming, sound control, and interpretation. When not in use, these holes can be mechanically sealed to prevent sound leakage.
For lighting, we utilize a 4000K natural-light color temperature LED central lighting system with a standard 1600L sx output to meet daily needs. For professional lighting requirements, an expandable power supply is pre-installed in the cabin, allowing users to upgrade as needed.
For power, our products are compatible with 100-240V/50-60Hz and 12V-USB power supply systems, compatible with mainstream equipment and energy sources inside and outside the cabin, ensuring a stable power supply in all scenarios. We also conducted comprehensive acoustic tests on the silent cabin, including reverberation tests, sound insulation tests, speech clarity and frequency response tests, to ensure it achieves the best acoustic effects.
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