Real-time Signal and Sound Level Meter Tool
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Level Meter

Reference: Documentation

Built for Standardized Measurement: The Level Meter offers standard sound level metrics, including time and frequency weighting, defined by ANSI S1.4 and IEC 61672 standards for sound level meters. The Level Meter also supports real-time root-mean-square (RMS) level calculations for non-acoustic signals, including dBV and dBu for audio signals.
Data Logging (Pro Feature): Log sound level data for up to 2 weeks at intervals as small as 0.1 seconds. Use the auto-save feature to keep logging data beyond 2 weeks, for as long as your device has disk space available.
Save Data: Export signal level values and metadata to a data file (.csv, .mat, or .txt). Or, generate a high-resolution image of the display and save it to a PDF file.
Live Web Preview (Pro Feature): Use SignalScope's built-in http web server to monitor signal levels remotely via a standard web browser. Your own custom software can remotely retrieve information from the Level Meter as JSON data to format, analyze, store, or display according to your specific needs.
  • Input: 1 channel at a time, selected from any available input, output, or virtual output channels
  • Sound Level Type
    • Time-exponential-weighted Sound Level (Lp)
    • Equivalent Sound Level (Leq)
    • Percentile-exceeded Sound Level (Lx) (Lx is a Pro Feature)
  • Frequency Weighting: Z (zero, or no weighting), A, C
  • A, C Frequency Weighting Supported Sample Rates (samples/second): 44100, 48000, 88200, 96000, 176400, 192000
  • Sound Level Time Weighting: Fast, Slow, Impulse
  • Signal Level Type: Exponential, RMS
  • Signal Averaging Time (s): 1/8, 1, infinite (limited only by the measurement duration)
  • Automatic Stop: Enable/Disable
    • Duration: 0.1 seconds up to 14 days, 23 hours, 59 minutes, 59.9 seconds
  • Data Logging (Pro Feature)
    • Log Size: Uses Automatic Stop Duration
    • Log Levels: Enable/Disable
    • Log Interval: User-defined, with constraints
      • Data Log Size > 72 hours: Log interval >= 10 seconds
      • Data Log Size > 8 hours: Log interval >= 1 seconds
      • Data Log Size <= 8 hours: Log interval >= 0.1 seconds
    • Reset Leq at Intervals: Enable/Disable
    • Auto Save Log: Enable/Disable
    • Log File Format: CSV, MAT, TXT
    • Base File Name: User-defined
    • Maximum Auto Saves: User-defined, if Auto Save Log is enabled, data logging will stop after this many log files have been saved
    • Reset All After Auto Save: Enable/Disable
  • Notification Events (Pro Feature): Local Notifications
    • Auto-Stop
    • Lp_max Exceeds: User-definable sound level threshold
    • Leq Exceeds: User-definable sound level threshold
  • Scale
    • Level divisions: 10
    • Autoscale: Off, Auto, Up, Down
    • Level Axis: Lin, dB
    • dB Level Scale (dB/Div)
      • 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 0.9, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 8.0, 9.0, 10.0, 12.0, 15.0, 16.0, 18.0, 20.0, 24.0, 25.0, 27.0, 30.0
    • Lin Level Scale (Units/Div)
      • 1e-9, 2e-9, 3e-9, 4e-9, 5e-9, 6e-9, 8e-9, 10e-9, 20e-9, 30e-9, 40e-9, 50e-9, 60e-9, 80e-9, 100e-9, 200e-9, 300e-9, 400e-9, 500e-9, 600e-9, 800e-9, 1e-6, 2e-6, 3e-6, 4e-6, 5e-6, 6e-6, 8e-6, 10e-6, 20e-6, 30e-6, 40e-6, 50e-6, 60e-6, 80e-6, 100e-6, 200e-6, 300e-6, 400e-6, 500e-6, 600e-6, 800e-6, 1e-3, 2e-3, 3e-3, 4e-3, 5e-3, 6e-3, 8e-3,10e-3, 20e-3, 30e-3, 40e-3, 50e-3, 60e-3, 80e-3,100e-3, 200e-3, 300e-3, 400e-3, 500e-3, 600e-3, 800e-3, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 80.0, 100.0, 200.0, 300.0, 400.0, 500.0, 600.0, 800.0, 1e3, 2e3, 3e3, 4e3, 5e3, 6e3, 8e3, 10e3, 20e3, 30e3, 40e3, 50e3, 60e3, 80e3, 100e3, 200e3, 300e3, 400e3, 500e3, 600e3, 800e3
  • Data Export
    • Data File Format: CSV, MAT, TXT
    • Image: PDF
    • Optionally include current location in exported data files.
  • Specifications Subject to Change
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