Interference of rock music at a concert

In summary, the conversation discusses the minimum signal that can be heard at an outdoor rock concert when two loudspeakers are located 2.4 meters apart and the listener is standing at different distances from each speaker. The solution involves finding the path length difference that results in constructive or destructive interference, which can be determined by ensuring crests and troughs overlap. This is not related to beats, but rather the wavelength of the sound waves.
  • #1
Bryon
99
0

Homework Statement


Two loudspeakers at an outdoor rock concert are located 2.4 meters apart. You are standing 17.7 meters from one of the speakers and 20.7 from the other. During a sound check, the technician sends the exact same frequency to both speakers while you listen. The technician starts at 20Hz and slowly increases it to 30,000Hz.

What is the lowest frequency where you will hear a minimum signal ?

2. Equations

y(t) = Acos(wt) + Acos(wt)

3. Attempt at the solution

I am not sure how to go about this one. But here is my thoughts on it. Since you are at a different differences from each of the speakers, the waves will arrive out of phase and will interfere constructively or destructively. I am thinking that this is related to beats. Any help?
 
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  • #2


It isn't related to the beats, but the path length has to be an odd multiple of a half-wavelength in order for there to be a minimum. That's because such a path length difference ensures crests overlap with troughs and cancel.
 
  • #3


So would I just find how much of the 20Hz signal would fit on each distance?
 

Related to Interference of rock music at a concert

What is interference of rock music at a concert?

Interference of rock music at a concert refers to the distortion or disruption of sound caused by external factors such as background noise, technical issues, or overlapping frequencies.

What are the common causes of interference in rock music concerts?

The most common causes of interference in rock music concerts include competing sound sources, improper sound system setup, electrical interference, and environmental factors such as wind or rain.

How can interference be prevented at a rock music concert?

To prevent interference at a rock music concert, it is important to properly plan and set up the sound system, use high-quality equipment, and minimize the use of wireless devices that can cause interference. It is also important to choose a suitable outdoor venue and monitor for any potential sources of interference.

What are the effects of interference on a rock music concert?

Interference can have negative effects on a rock music concert, including a decrease in sound quality, disruptions to the performance, and potentially causing discomfort or annoyance to the audience. It can also affect the overall energy and atmosphere of the concert.

Can interference be fixed during a rock music concert?

In some cases, interference can be fixed during a rock music concert by adjusting the sound system or addressing the source of interference. However, it is best to prevent interference beforehand to avoid any disruptions to the performance.

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