Physics A-Level
Equal loudness curve
What Equal loudness curve means in Physics A-Level, as defined for AQA.
Definition of Equal loudness curve
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Reference: AQA
A curve joining points of equal perceived loudness, produced by adjusting a test tone until it sounds equally loud as a reference tone at 1 kHz.
Topics that use Equal loudness curve
- Sensitivity and frequency response (A-level only) (AQA A-Level)
Related terms
- Intensity
- Inverse-square relationship
- Logarithmic scale
- Loudness perception
- Relative intensity
- Decibel scale
- Perceived loudness
- Phon
Using Equal loudness curve in the exam
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