The TA656 Series Digital Sound Level Meter, also known as a Noise Meter, Decibel Meter, dB Meter, Sound Pressure Level Meter, Environmental Noise Tester, or Noise Measurement Instrument, is a professional handheld device designed for accurate environmental noise measurement in industrial, commercial, construction, occupational health, and daily noise assessment applications. Equipped with a high-sensitivity 1/2-inch condenser microphone and A-weighting measurement mode, the TA656 series simulates the human ear’s response to sound frequencies and provides reliable noise measurements from 30.0 to 130dB with a frequency response range of 31.5Hz to 8kHz. It supports both FAST and SLOW time weighting modes, allowing users to measure rapidly changing noise signals as well as stable continuous sound environments. The TA656A Digital Sound Level Meter is designed for general noise inspection and field measurement, while the TA656B Bluetooth Sound Level Meter integrates wireless Bluetooth data transmission, allowing users to connect with mobile devices for convenient data viewing, recording, and management, making it ideal for professional monitoring applications requiring efficient data collection. With its compact handheld design, intuitive operation, backlit display, and stable measurement performance, the TA656 Series Noise Meter is widely used in factory workshops, manufacturing plants, machinery maintenance, environmental protection monitoring, construction site inspection, building acceptance testing, office buildings, schools, hospitals, transportation noise analysis, equipment rooms, residential areas, and home audio environment testing. It provides an effective solution for noise control, workplace safety management, environmental assessment, and acoustic measurement.