Constructive and destructive interference

  • Viewgraph 5

  • Viewgraph 6

    Joe goes to the concert hall and hears two pianos played at once. Each piano strikes an identical 250 Hz note. 

    

      Q:  Does Joe hear constructive interference,
          destructive interference, or something 
          in between?




      Q:  If Joe wants to hear a louder sound,
          what should he do?  Be specific.