Fletcher Munson Curve Visualizer

The Fletcher Munson Curve Visualizer helps you understand how our ears perceive sound at different volumes. This tool simulates the human hearing response at various loudness levels, making it easier for audio professionals to create mixes that sound balanced at different listening levels.

Fletcher Munson Curve Visualizer
Fletcher Munson Curve Visualizer
Understand how human hearing perception changes across different frequencies and volume levels. This visualization helps you make better mixing decisions at different monitoring levels.
Current Level
Reference Level
What are Equal Loudness Contours?
Equal loudness contours show how the human ear perceives different frequencies at different volumes. The curves demonstrate that our ears are most sensitive to frequencies between 2-5 kHz, and less sensitive to very low and very high frequencies, especially at lower volumes.
Why This Matters for Mixing
Understanding these curves helps you:
  • Make better EQ decisions at different monitoring levels
  • Understand why mixes sound different at different volumes
  • Choose appropriate monitoring levels for different mixing tasks

Practical Applications

Bass Management
When mixing at low volumes, you might over-compensate on bass frequencies because your ears are less sensitive to them. Check your low-end decisions at different volumes.
Try mixing bass around 85 dB SPL for the most balanced perception.
High Frequency Balance
High frequencies can appear more prominent at higher volumes, which might lead to overly dark mixes if you’re monitoring too loud.
Check high frequency content at both loud and quiet levels.
Mid-range Focus
The ear’s increased sensitivity around 2-5 kHz remains relatively consistent across volumes, making this range crucial for mix decisions.
Use this range as a reference point when comparing different monitoring levels.

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