Physics A-Level
Sound intensity level
What Sound intensity level means in Physics A-Level, as defined for AQA.
Definition of Sound intensity level
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Reference: AQA
A quantity in dB given by 10 log₁₀(I / I₀), where I₀ is 1 × 10⁻¹² W m⁻².
Topics that use Sound intensity level
- Sensitivity and frequency response (A-level only) (AQA A-Level)
Related terms
- Equal loudness curve
- Intensity
- Inverse-square relationship
- Logarithmic scale
- Loudness perception
- Relative intensity
- Decibel scale
- Perceived loudness
Using Sound intensity level in the exam
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