How U determine first and second reflection points


Someone told me following a while ago in room teak thread, but I don't think I understand it well. Any comments?
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Have someone sit in the primary listening location, take a mirror to the side walls opposite each speaker and move it until the seated person can see the speaker reflected in the mirror. These are your first reflection points. Start from there.
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eandylee

Showing 3 responses by eandylee

So, each of the left and right walls will have 2 relection poinsts - one from right speaker and one from left speaker?
Or, each wall will have first reflection point from the speaker on the same side and the reflection of the speaker on the other side is considered second refection point?

seems like slight difference in definiton of first and second reflection point by Tvad and Fmpnd.