CSEC Physics · 1992 · Paper 2 · Question 5(b)(iii)

An observer notices that when she stands at X, she hears equally well from the three speakers. However, when she stands at Y, she hears mainly from one speaker and much less from the others. From which speaker does she hear most sound when standing at Y?

This question uses a figure or table from the paper — you'll see it when you practise.