In 2025, Junttan created a patented noise-reduction solution for pile driving rig hammers designed to support community-conscious piling operations.
The Junttan Noise Silencer Kit is designed to significantly minimize noise levels. The kit includes a silenced drive cap housing, airborne noise silencer and silenced drive cap. By utilizing advanced materials and engineering, it delivers a substantial noise reduction — far beyond existing solutions.
The kit is currently available for Junttan SHK and HHKS hammers with 800 mm diameter drive cap housing.
A key advantage of this solution is its retrofit compatibility. The system can be installed on all Junttan SHK and HHK hammers, allowing both new and existing drill rigs to benefit from reduced sound emissions. This provides a practical, cost-effective upgrade path without replacing existing equipment.
By enabling lower sound levels, contractors can expand operational flexibility and confidently pursue projects with clearly defined environmental parameters.
The system is already helping contractors operate in environments where noise limitations would otherwise restrict working hours or prevent project execution altogether.
You may also like:
- Extensive R&D leads to Junttan Evolution series
- Liebherr’s LB 35.1: Higher performance, deeper depths
- The fine art of foundation repair
Since its launch, the Junttan Noise Silencer Kit has gained traction with foundation contractors in northern Europe, where urban projects and strict environmental frameworks require new solutions.
The field trials conducted by Junttan customers confirm that noise perceived by the human ear can be reduced by up to 50 per cent.
For example, Aarsleff Ground Engineering, based in the United Kingdom, recently shared their results from installing the Junttan Noise Silencer Kit on a live project. The contractors opted for the kit after residents raised concerns regarding site sound levels.
To test the effective noise reduction, the company added the noise silencing kit to a Junttan PMx22 pile driver equipped with a 5-tonne Shark hammer. They also operated the same setup without the silencer.
To ensure reliable data, Aarsleff measured the noise generated over a 10-hour working period.
The results showed a consistent reduction across all measured distances. From a 5-metre distance, noise was reduced form 100 dB to 93 dB; from 10-metres noise dropped from 94.7 dB to 87.6 dB; and at 15 metres, noise fell to 82.6 dB form 89.9 dB.
As Aarsleff noted, the decibel scale is logarithmic — meaning that every 10 dB reduction is perceived as roughly halving the sound level to the human ear. A 7 dB reduction delivers a clearly noticeable improvement in real working conditions.
For Aarsleff, the outcome supports their commitment to being a responsible neighbour while maintaining efficient project delivery.
