Real-time Signal and Sound Level Meter Tool

Level Meter

Found in these Apps

SignalScope X
SignalScope Pro 2022
SignalScope Adv 2022

Features

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.

Specifications

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