FFT Analysis with SoundAdvisor Model 831CRent a Sound Level Meter with Single Channel FFT Analysis for Sound and Vibration
Fast Fourier Transform (FFT) can be incredibly useful in identifying key frequencies of a signal. Rent a Sound and Vibration FFT Analyzer which pairs the trusted Larson Davis SoundAdvisor™ Sound Level Meter with FFT Firmware. Ideal for machinery troubleshooting, tone detection, and noise source identification, the system offers benefits such as:
- Handheld, single-channel FFT measurements
- In-the-field tonal assessment and analysis
- Measurement of specific frequencies or tones in audio processing
- Support for Engineering Units
- Real-time data on the meter, mobile device, or PC
- Auto peak finding with harmonic cursors
831C-FFT Accessories
To order, add 831C-FFT to any 831C Rental Kit.
Which Window to Choose for FFT Analysis?
A phenomenon known as leakage occurs when processing real-world signals, resulting in lower peak amplitudes and “smeared” frequency responses. Although leakage effects are commonly seen, the effects can be reduced with use of a “Window” function.
Window Type |
Description |
Uniform / No Window |
Broadband or random signals, or closely spaced sine signals |
Hanning |
Most real-world signals, or combination of sine signals or narrowband random vibration signals |
Flat Top |
Best to preserve amplitude peak level when measuring sine waves |
See Understanding FFT Windows for more information on why window functions are useful in FFT Analysis and which window to use for your application.
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