You are provided with three similar, but slightly different, tuning forks, when A and B are both struck, a beat frequency of $$f_{AB}$$ is heard. When A and C are both struck, beat frequency of $$ f_{AC}$$ is heard. It was noticed that $$f_{AB} < f_{AC}$$. This experiment is repeated after coating tuning fork A with a little wax. Now it is observed that values of both $$f_{AB}$$ and $$f_{AC}$$ increase. 

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