You are standing $3.0\mathrm{m}$ from one speaker and $2.5\mathrm{m}$ from another. Both are emitting identical 680Hz tones in phase. What best describes what you would observe? Use $340\text{ m/s}$ for the speed of sound.

(II) Suppose two linear waves of equal amplitude and frequency have a phase difference ϕ as they travel in the same medium. They can be represented by ₁ ₂ ω θ

D₁ = A sin (kx - ωt)

D₂ = A sin ( kx - ωt + ϕ)

(b) What is the amplitude of this resultant wave? Is the wave purely sinusoidal, or not?

In the following figure, two interfering waves are drawn at some instance in time. 

a. Indicate the regions on the graph where constructive interference occurs.
b.Indicate the regions on the graph where destructive interference occurs.