Environmental Noise Monitoring Systems
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Reference level : 114.0 dB re. 20 μPa
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Reference level range: Single large range for SLM Normal for OBA option, Gain 0 dB
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Reference frequency : 1000 Hz
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Reference direction : 0° is perpendicular to the microphone diaphragm
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Temperature Effects ≤ ± 0.5 dB error between +14 to +122 °F (-10 to 50 °C)
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Operating Temperature -13 °F to +122 °F (-25 °C to +50 °C)
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Storage temperature -13 to +158 °F (-25 to +70 °C)
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Humidity ≤ ± 0.5 dB error from 30% to 90% relative humidity at 104 °F (40 °C)
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Equivalent Microphone Impedance 12 pF for Larson Davis 1/2 in microphone
Model: 831 - NMS
Product Specification Sheet
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Rapid deployment
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Emailed reports and event notification
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Full data for advanced analysis
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Web publication made easy
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Leverage existing infrastructure
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Remote administration
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User control of system and data
Model: Noise Tutuor
Product Specification Sheet
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Class 1 Sound Level Meter
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Random Incidence (RI) or Free Field (FF) microphones
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Complete firmware package
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30 hours of operations using AA lithium batteries
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Rugged, compact, lightweight
Model: SoundExpert LxT
Product Specification Sheet
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IEC 61672-1:2013, ANSI S1.4, ANSI S1.43 Class 1 integrating sound level meter
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Voice Annotation
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ANY LEVEL Display
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User programmable run modes
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Six user selectable statistics (Ln)
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Threshold exceedance data
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Community Noise Calculations (Lden, CNEL)
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GPS Global Positioning Support
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Back Erase Functionality
Model: 831
Product Specification Sheet
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Averaging (Integration Method) : Linear or Exponential
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Time Weightings : Slow, Fast,or Impulse
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Frequency Weightings : A, C, and Z
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Peak Detector Frequency Weighting : A, C, or Z
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Gain : 0 dB or +20 dB
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Sample Rate : 51,200 Hz
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Peak Rise Time : 30 µs
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Metrics Measured : Leq, Lmax, Lmin, Lpeak, Ln (6 values), LDN, LDEN, LCeq – LAeq