Turn-key M-STEALTH™ sound attenuation package to reduce noise on the Komatsu 930E 5 haul truck
Mine type – Open-cut
Mineral – Coal
Location – Central Tablelands, New South Wales, Australia
Product/Scope – Turn-key M-STEALTH™ Package on the Hitachi EX5600 7 excavator
Breve
The client required a robust sound attenuation solution to meet stringent asset-level noise requirements for their Komatsu 930E-5 haul truck fleet. The goal was to reduce the cumulative sound power generated by surface operations while minimizing emissions, without compromising performance or payload.
Desafio
The mine operates under strict environmental regulations and risks exceeding regulated site noise limits without a long-term noise control solution in place for nearby receptors and ongoing monitoring. Therefore, a site-wide compliance strategy was necessary to avoid community impact and operational restrictions.
Scope
Minetek Sound was engaged to attenuate six Komatsu 930E 5 haul trucks with a custom solution that:
- Achieved site-specific sound power targets
- Used minimal componentry to preserve payload efficiency
- Maintained strict OEM backpressure and airflow tolerances
Minetek engineers modified the M-STEALTH™ Sound Package to accommodate new undercarriage variations, demonstrating the flexibility and precision of the design process.
Resultados
- Noise reduction: From 120 dBA to 115 dBA
- Compliance: Machines can now operate 450m closer to site boundaries
- Efficiency: All 6 trucks completed on schedule with no safety issues
- Preservation: Payload retained through lightweight component selection
Minetek delivered a compliant, high-performance attenuation solution tailored to the client's operational needs. The project achieved regulatory compliance without downtime, risk, or payload loss. The M-STEALTH™ Sound Package enabled the fleet to meet regulatory requirements while maintaining productivity and supporting the mine’s social license to operate.
Pre attenuation
120 dBA
The Komatsu 930E 5 registered a factory sound frequency level of 120 dBA prior to Minetek Sound Attenuation.
Post attenuation
115 dBA
The sound output of the Komatsu 930E 5 was tested after installing Minetek’s turn-key M-STEALTH™ sound attention solution. This registered a sound frequency level of 115dBA.
Sound reduction
5 dBA
Minetek was able to reduce the sound output on the Komatsu 930E 5 mining haul truck by 5dBA.
450m closer to the boundary or sound receiver
his calculation is based on hemispherical radiation (Q = 2) and assumes ideal weather conditions, with no temperature inversion, wind, or fog.