Acoustics enclosure for auto mobile plant are available for range of application , one of them is acoustic chamber for roller testing of cars. It is designed to limit the noise level within 75 dBA. The chamber was provided with forced ventilation system consisting of centrifugal blowers and the exhaust ducted to out side. The acoustic chamber is provided with automatic sliding doors at both ends to facilitate the movement of cars in and out of the chamber. After installing the system, a noise survey was conducted and the noise level was found to be with in the specified limits.