Time Frequency Analysis (TFA)
Features and Benefits
The Time-Frequency Analysis (TFA) visualizes the characteristics of an audio signal over time and frequency. Using recorded signals of the audio system, the TFA helps investigate the impulse response as well as different kind of distortions (harmonics, intermodulation, impulsive …). Both temporal and spectral information are used to identify defects with random properties (e.g. loose particles), which generate distortion components distributed over all frequencies.
Applications:
- 3D defect analysis (Rub & Buzz)
- Detecting acoustical and mechanical resonators (room modes, rocking modes)
- Visualizing harmonic and intermodulation distortion
Analysis Methods:
- Wavelet transform
- Short-time fourier transform (STFT)
- Filter bank
Specification
Requirements
Related Information
Other Modules of the R&D System
- Transfer Function Measurement (TRF):
Measurement of transfer function and harmonic distortion
Related Products
- Spectrogram 3D Limits (3DL):
Powerful and intuitive defect (Rub & Buzz) analysis based on auditory time/frequency (spectrogram) analysis
