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Sound level meters

Sound is a sequence of waves of pressure that propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). Sound that is perceptible by humans has frequencies from about 20 Hz to 20,000 Hz. In air at standard temperature and pressure, the corresponding wavelengths of sound waves range from 17 m to 17 mm. During propagation, waves can be reflected, refracted, or attenuated by the medium.[2]

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WALL LCD DIGITAL SOUND LEVEL METER 30~130DB DECIBEL NOISE MEASUREMENT W/ INTERNAL SENSOR CIA039   Key Specifications/Special Features: Measurement Range: 30~130dB 60dB Dynamic Space in Each Range Accuracy: ±1.4dB Time Weighting Fast/Slow Frequency Weighting A/C Max/Min Function Good Cooling: The meter back panel is designed with multiple heat dissipation vents, which is and durable, suitable for long term Digital Screen: The decibel meter adopts 13in large screen to clearly view the real time decibel level, temperature and humidity, with adjustable brightness. Alarm... Sound level meters
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WALL LCD DIGITAL SOUND LEVEL METER 30~130DB DECIBEL NOISE MEASUREMENT W/ EXTERNAL SENSOR CIA039B Good Cooling: The meter back panel is designed with multiple heat dissipation vents, which is and durable, suitable for long term Digital Screen: The decibel meter adopts 13in large screen to clearly view the real time decibel level, temperature and humidity, with adjustable brightness. Alarm Prompt: The default alarm value for power on is 130dB. When the measured value exceeds the alarm value, the decibel meter will emit an alarm sound. Levels Display Bar: With analog bar Levels... Sound level meters