Máy đo tiếng ồn âm thanh Rion NA-37B Thông tin sản phẩm Máy đo tiếng ồn âm thanh Rion NA-37B (English): The NA-37B is Rion’s 6th generation Aircraft Noise Monitor. The NA-37 and its predecessors are widespread in Japan with hundreds of units currently monitoring noise from both civil and military airports. The NA-37 offers […]