Boiler room adjacent to a bedroom: judicial resolution
95% of the problem was not airborne noise but structural transmission. A precise diagnosis closed the legal case.
The challenge
The intervention took place in a boiler room affected by a court ruling due to noise problems in an adjacent dwelling, specifically in a bedroom located wall-to-wall with the technical room. The proximity made any sound or vibratory transmission especially sensitive.
In a first phase, exhaustive acoustic measurements were carried out, confirming that the airborne sound insulation between both rooms was sufficient for the levels generated inside. This result ruled out the need to reinforce enclosures, evidencing that over 95% of the transmission occurred via the structural path. The technical diagnosis thus corrected the initial idea of acting on airborne insulation, avoiding an unnecessary and ineffective investment.
The solution
The solution focused on vibration control. Specific anti-vibration plinths were designed and calculated based on the weights and operating frequencies of pumps and boilers, ensuring an adequate natural frequency and correct dynamic decoupling.
All duct networks and rigid connections susceptible to transmitting vibratory energy to the building structure were also damped and decoupled. Additionally, certain equipment was replaced with more energy-efficient alternatives, improving the overall performance of the installation.
The result
Following execution of the corrective measures, verification measurements confirmed that boiler room operation is acoustically imperceptible in the adjacent bedroom, fully meeting technical objectives and closing the legal proceedings. This project demonstrates the importance of rigorous acoustic diagnosis and a structural approach in complex transmission problems, where the key is not adding mass but correctly decoupling the source.
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