NAkid
Apr6-08, 04:13 PM
1. The problem statement, all variables and given/known data
Two loudspeakers are located 3.41m apart on an outdoor stage. A listener is 18.40m from one and 18.70m from the other. During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz to 20 kHz). What are the three lowest frequencies at which the listener will hear a minimum signal because of destructive interference and the three lowest frequencies at which the listener will hear a maximum signal.
2. Relevant equations
3. The attempt at a solution
I really don't even know where to start. i know that destructive interference occurs when the path difference is d=v/2f, 3v/2f, 5v/2f... but not sure what to try next.
Two loudspeakers are located 3.41m apart on an outdoor stage. A listener is 18.40m from one and 18.70m from the other. During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz to 20 kHz). What are the three lowest frequencies at which the listener will hear a minimum signal because of destructive interference and the three lowest frequencies at which the listener will hear a maximum signal.
2. Relevant equations
3. The attempt at a solution
I really don't even know where to start. i know that destructive interference occurs when the path difference is d=v/2f, 3v/2f, 5v/2f... but not sure what to try next.