Sound Absorption Coefficient Calculator

Find the absorption coefficient from absorbed and incident energy.

Absorption coefficient α 0.7

Formula: α = absorbed ÷ incident

Step-by-step with your numbers:

1. Values used:

2. Absorbed energy = 7

3. Incident energy = 10

5. Absorption coefficient α = Absorbed energy / Incident energy = 7 / 10 = 0.7

Did we solve your problem today?

The absorption coefficient α is the fraction of sound energy a surface absorbs rather than reflects.

The math behind it

α = absorbed ÷ incident, ranging from 0 (perfect reflector) to 1 (perfect absorber).

7 of 10 units absorbed → α = 0.7.

What absorbs best?

Soft, porous materials like foam and heavy curtains have high α.