Two violinists, one directly behind the other, play for a listener directly in front of them. Both violinists sound concert A 1440 Hz2.

(a) What is the smallest separation between the violinists that will produce destructive interference for the listener?

(b) Does this smallest separation increase or decrease if the violinists produce a note with a higher frequency?

(c) Repeat part (a) for violinists who produce sounds of 540 Hz.