Signal Processing Concepts and Engineering Insights.
Explore signal processing concepts, algorithm comparisons, and practical engineering insights.
Topics include FFT vs STFT, FRF analysis, filtering techniques, and other signal processing methods used in real engineering workflows.
Overview
When measuring sound, we don’t just measure physical pressure.
We also want to reflect how humans actually hear sound.
However, human hearing is:
Frequency Weighting Curves
The most common ones are:
All weightings are normalized to 0 dB at 1 kHz
Why Weighting Is Needed
If we measure raw sound:
Weighting adjusts measurements to match perceived loudness
A-Weighting
Characteristics
Usage
Behavior
B-Weighting
Characteristics
C-Weighting
Characteristics
Usage
Comparison Summary
When Should You Use Each?
Key Takeaways
Weighting = Perception correction
Conclusion
A-, B-, and C-weighting curves bridge the gap between:
Suggested Further Reading