Before trying to answer my question, read what is in the picture below. (This is not a problem I can figure out myself, LOL).
Question:
Suppose that in an elliptical room, one person is speaking at a focal point, and another person, who is quiet, is at another focal point. Assume that the distance between the focal points is 23 meters. How many dB softer is the sound at the non-speaker's position, than at the speaker's position, assuming an absorption coefficient of 0.2? Tell me if you are able to answer this question.