Reverberation Time Calculator (RT60)
Calculate room reverberation time RT60 using the Sabine formula from room volume and total acoustic absorption.
How to Use the RT60 Calculator
- Calculate room volume (length × width × height) in m³.
- Calculate total absorption: sum each surface area multiplied by its absorption coefficient.
- Enter both values and click Calculate.
Casos de Uso
- •Acoustic design of concert halls, studios, and classrooms.
- •Checking compliance with speech intelligibility standards.
- •Estimating the effect of adding acoustic treatment to a room.
Fórmula
RT60 = 0.161 × V / A (Sabine formula), where V is room volume (m³) and A is total absorption area (m², sabins).
Preguntas Frecuentes
What is RT60?
RT60 is the time (in seconds) for a sound to decay by 60 dB after the source stops. It is the primary measure of room acoustics and affects speech intelligibility and music quality.
What is total acoustic absorption?
Total absorption A = Σ(Sᵢ × αᵢ), where S is the area of each surface and α is its absorption coefficient (0–1). Absorption coefficients are tabulated for common materials.
Is this calculator free?
Yes, all OhMyCalc calculators are completely free to use.