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Sound and Vibration Concepts



Dynamic Signals

Signal Types and Transducers

Sound Signals and Transducers
Vibration Signals and Transducers
Tachometer Signals and Transducers

Acquiring and Simulating Dynamic Signals

Scaling and Calibration

Scaling Signals to Engineering Units
Performing System Calibration

Limit Testing Analysis

Limit Testing Data Types
Using the SVL Limit Testing VI

Weighting Filters

Acoustic Weighting Filters

Applying Acoustic Weighting Filters
Acoustic Weighting Standards

Human Vibration Weighting Filters

Applying Human Vibration Weighting Filters
Human Vibration Weighting Standards

Integration

Introduction to Integration
Implementing Integration
Time-Domain Integration
Frequency-Domain Integration

Sound Level Measurements

Time Averaging Modes
Considerations for Making Sound Level Measurements

Vibration Level Measurements

Measuring the Root Mean Square (RMS) Level
Performing a Running RMS Level Measurement
Computing the Peak Level
Computing the Crest Factor

Fractional-Octave Analysis

Fractional-Octave Analysis Fundamentals
Bandwidth and Filter Banks
Averaging
Performing Third-Octave Analysis outside the Audio Range
Octave Analysis Standards
Displaying Fractional-Octave Analysis Results
Octave Extended Measurements

Frequency Analysis

FFT Fundamentals
Zoom FFT Analysis
Subset Analysis
Windowing
Averaging Parameters
Using the Frequency Analysis VIs
Spectrum Extended Measurements

Swept-Sine Measurements

Swept-Sine Fundamentals
Choosing Swept-Sine versus FFT Measurements
Performing a Swept-Sine Measurement
Swept-Sine Measurement Example

Distortion Measurements

Signal in Noise and Distortion (SINAD)
Total Harmonic Distortion Plus Noise (THD+N)
Total Harmonic Distortion (THD)
Signal-to-Noise Ratio (SNR)
Intermodulation Distortion (IMD)
Phase Linearity

Single-Tone Measurements

Gain and Phase
Crosstalk
Gain
Idle-Channel Noise
Dynamic Range
Spurious Free Dynamic Range (SFDR)

Transient Analysis

Performing an STFT versus Time
Measuring a Shock Response Spectrum

Tachometer Signal Processing

Removing Trend from Analog Tachometer Signals
Locating Pulse Positions
Calculating the Rotational Speed
Compensating for the Input Filter Delay
Calculating a Speed Profile without a Tachometer Signal

Order Analysis

Order Analysis Fundamentals

Order Analysis Application Areas and Process
Methods for Performing Order Analysis

Functions and Displays

Spectral Map
Order Power Spectrum
Order Magnitude and Phase
Order Waveform

Level Measurements
Reference Data Processing
Using the Order Analysis Express Measurements Express VIs

Before You Begin
1. Loading the Example Data
2. Analyzing the Speed Profile
3. Analyzing the Colormap
4. Analyzing the Order Power Spectrum
5. Analyzing the Magnitude Plot
6. Extracting Order Waveforms

Fault Detection

Rolling-Element Bearing Fault Detection

Performing Constant-Speed Bearing Fault Detection
Performing Variable-Speed Bearing Fault Detection
Inner Race or Rolling Element Faults
Calculating Characteristic Frequencies and Orders

Gear Fault Detection

Torsional Vibration Measurement

Using the Torsional Vibration Measurement VIs
Performing a Torsional Vibration Measurement

Display

Waterfall and Octave Waterfall Graphs
Colormaps
Bode Plot and Polar Plot
Orbit, Timebase, and Shaft Centerline Plots

File I/O

UFF58 File Format
Reading UFF58 Files
Writing to UFF58 Files