1. What is Sound Absorption?

Sound absorption refers to the process by which a material, structure, or object absorbs sound energy when sound waves encounter it. The absorption coefficient (α) represents the fraction of sound energy absorbed by a material.

2. How Does the Calculator Work?

The calculator uses the sound absorption equation:

Where:

• \( A \) — Sound absorption in sabins
• \( \alpha \) — Absorption coefficient (0 to 1)
• \( S \) — Surface area in square meters (m²)

Explanation: The total sound absorption is the product of the material's absorption coefficient and the area of the absorbing surface.

3. Importance of Sound Absorption Calculation

Details: Calculating sound absorption is essential for acoustic design in spaces like concert halls, recording studios, and offices. It helps control reverberation time and improve sound quality.

4. Using the Calculator

Tips: Enter the absorption coefficient (between 0 and 1) and the surface area in square meters. The absorption coefficient varies by material and frequency.

5. Frequently Asked Questions (FAQ)

Q1: What is a sabin?
A: A sabin is the unit of sound absorption, equivalent to 1 square meter of perfectly absorbing surface (α = 1).

Q2: What are typical absorption coefficients?
A: Concrete (0.02), Carpet (0.30), Acoustic panels (0.80-0.95), Open window (1.00).

Q3: Does frequency affect absorption?
A: Yes, most materials have different absorption coefficients at different frequencies.

Q4: How is this used in room acoustics?
A: Total absorption helps calculate reverberation time using Sabine's equation: RT = 0.161V/A.

Q5: What's the difference between absorption and insulation?
A: Absorption reduces sound within a space, while insulation blocks sound transmission between spaces.