Question

Two speakers face each other, and they each emit a sound of wavelength (lambda). One speaker is 180 (degrees) out of phase with respect to the other. If we separate the speakers by a distance1.5 (lambda),how far from the left-most speaker should we place a microphone in order to pick up the loudest sound? Ignore reflections from nearby surfaces. Select all that apply.

• 3/4 lambda
• 0  lambda
• 1/2  lambda
• 1/4  lambda
•   1     lambda

 

Answer 1

0 lamda
1/2 lamda
1 lamda