Final answer:
The circling minima can be found at certain angles on the circle using interference patterns. Minima occur at angles where the path difference between the waves from the speakers is equal to an odd multiple of half the wavelength.
Step-by-step explanation:
The circling minima can be found at certain angles along the circle. These angles can be determined using interference patterns. When two speakers producing the same frequency of sound are a distance of d apart, there will be minima at the angles where the path difference between the waves from the speakers is equal to an odd multiple of half the wavelength.
For example, if the wavelength is represented by λ, then the path difference between the waves from the speakers can be found using the formula Δx = d sinθ, where θ is the angle from the center of the circle. The minima will occur when Δx = (2n + 1)λ/2, where n is an integer.