Overview
Challenges in Reducing Railway Noise
Passenger & Resident Impact
– High-speed train noise causes discomfort & health risks
Slab Track Vulnerability
– Concrete slab tracks intensify noise, worsening the issue
Urgent Need for Noise Reduction Technology
– Effective solutions are required
Material Limitations
– Organic absorbers: poor flame resistance & durability
– Foamed aluminum: high economic cost
– Inorganic lightweight foams: limited absorption & strength, impractical for application
Core Competencies
Purpose
To develop noise-absorbing structures for railways that ensure long-lasting performance, easy maintenance, and high durability under harsh conditions.
High voltage emitter generates ionic wind via corona discharge, enabling fine dust collection without a fan.
High-strength sound-absorbing structure addressing performance degradation of conventional soundproof panels
Composition of aggregate and polyurethane binder with excellent non-flammability and freeze–thaw resistance
Structural stability and durability maintained under harsh conditions such as high-speed train wind pressure and outdoor exposure
Expected Benefits
Wide Applicability
– For track blocks, tunnel walls, and noise barriers
Noise Reduction
– In train interiors, platforms, and trackside areas
Emerging Noise Mitigation
–From higher speeds, slab tracks, and long tunnels
Economic Efficiency
– Semi-permanent use ensures cost savings
Proven Effectiveness
– Platform level: 94.4 → 88.9 dBA (−5.5 dB)
TRL 9
Technology development completed and ready for commercialization
Completion of certified test for UAS high-strength sound absorbing structure prototype (2016)
Completion of technology transfer of UAS high-strength sound-absorbing structure material (2016.9)
Completion of a field test for the application to railroad tunnel wall (2019)
Application to use as a part of soundproof wall to reduce railway noise (2018 ~ present)
Contact
Korea Railroad Research Institute (KRRI)
Global Business Department
Dr. Jiyoung Hong
E-mail: hongjy@krri.re.kr