First Reflection Point
The boundary coordinate where speaker sound reflects directly to listener ears within 20 ms.
First reflection points (early reflection points) are specific wall, floor, or ceiling locations where specular sound reflections travel directly to the listener with a time delay under 20 milliseconds, destroying stereo imaging.
How it works
Placing 2" to 4" porous absorption panels at first reflection points creates a Reflection-Free Zone (RFZ) at the listening position.
Work it out for your room
Put in your own room's size and get the numbers for it, free and without an account.
Open the First Reflection CalculatorReferences
- Davis, D. & Davis, C. (1980). The LEDE (Live-End/Dead-End) Concept
See this in your own room: draw it, place speakers and treatment, and simulate the result.