This lecture covers the principles and methods for determining noise emissions and immissions in environmental impact studies, focusing on buildings with Low-Usage Sensitive Buildings (LUSB). It explains the calculation models used to assess noise levels, the types of noise considered, and the evaluation criteria based on limit values. The lecture also discusses the propagation of noise, measurements for assessing existing situations, and the importance of sound insulation in building elements. Additionally, it addresses the impact of noise from various sources like civilian firing facilities, aerodromes, industries, and roadways, emphasizing the need for protective measures and noise reduction strategies.