The sound level meter is a professional instrument for accurately measuring the intensity level of sound. It uses high - precision acoustic sensors and advanced signal processing technology to accurately measure the decibel values of sounds of different frequencies. The outer shell is made of sturdy metal or engineering plastic materials with good protective properties, enabling it to adapt to various complex measurement environments. Its advantage lies in its high measurement accuracy and diverse functions. It can not only measure the instantaneous sound level but also perform measurements of various parameters such as equivalent continuous sound level and statistical sound level. It is widely used in fields such as noise monitoring, environmental assessment, acoustic research, and product noise testing. In noise monitoring, it provides accurate noise data for environmental management departments; in environmental assessment, it evaluates the impact of construction projects on the surrounding acoustic environment; in acoustic research, it assists researchers in conducting acoustic experiments; in product noise testing, it detects whether the noise level of products meets the standards.