ACTIVE STRUCTURAL ACOUSTIC CONTROL WITH REMOTE MICROPHONE TECHNIQUE FOR NOISE RADIATED BY A THIN PLATE

Noise pollution in industrial environments can significantly impact workers’ health and productivity, necessitating effective control measures. This preliminary study investigates the feasibility of an active structural acoustic control (ASAC) system to mitigate noise radiated by an industrial cabin wall. A cabin mock-up was created for this purpose, designed with passive acoustic treatments to improve noise insulation on three walls, the floor and the roof. Conversely, one of the cabin walls was realized with a thin steel plate without passive acoustic treatments. The ASAC system, applied to this plate, uses a single inertial actuator to suppress noise induced by an acoustic source inside the cabin and radiated to the external environment. The system employs the remote microphone technique (RMT) to attenuate the noise at a specific distance from the cabin. The experimental validation was conducted for different types of disturbing noise signals. The results highlight the potentiality of this method to control radiated noise. This work lays the foundation for scalable ASAC solutions in industrial environments, offering a promising path toward quieter workplaces.