Soundproofing Generators

How Soundproofing Generators works

Generators produce significant noise through mechanical vibrations and combustion processes, impacting both operators and nearby environments. Noise from generators is a combination of airborne sound, caused by engine exhaust and cooling fans, and structure-borne sound, transmitted through the generator’s frame and mounting. Typical sound pressure levels (SPL) for industrial generators range from 80–100 dB(A) at 1 meter, exceeding safe exposure limits set by OSHA (85 dB(A) for 8 hours) and causing disturbances in residential or commercial settings.

Airborne noise, dominant in the 500–4000 Hz range, results from rapid pressure changes in the engine and exhaust systems. Structure-borne noise, often in the 20–200 Hz range, arises from vibrations in the generator’s rotating components, such as pistons and crankshafts, which resonate with the frame. These low-frequency vibrations are challenging to mitigate due to their long wavelengths, requiring specialized damping materials.

Soundproofing solutions work by absorbing, damping, or isolating these noise sources. Sontech’s Acustimet® uses microperforated panels with a high absorption coefficient (α > 0.9) to capture airborne noise, leveraging Helmholtz resonance to dissipate sound energy as heat. This is particularly effective in generator enclosures, where space constraints demand lightweight materials. Acustimet® reduces SPL by up to 10 dB in the mid-to-high frequency range, creating quieter environments.

For structure-borne noise, VIBRALON 25 SB’s viscoelastic properties achieve a loss factor (η > 0.2), converting vibrational energy into heat. Applied to generator bases or frames, it minimizes resonance, reducing low-frequency noise transmission by up to 15 dB. Its durability against oil and temperature changes ensures long-term performance in harsh conditions, while its eco-friendly composition aligns with sustainability standards like ISO 14001.

Effective soundproofing also involves enclosure design and isolation. Sontech’s solutions integrate with sealed enclosures and vibration isolators, achieving total noise reductions of 20–30 dB in real-world applications, such as backup generators for hospitals or data centers. By addressing both noise types, our technologies ensure compliance with regulations like EU Directive 2000/14/EC and enhance user comfort.

Why Choose Sontech for Soundproofing Generators?