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Hey guys, I'm having a hard time understanding this explanation from tbr.
A closed pipe cannot vibrate twice the fundamental frequency. Why? If we were at twice the fundamental frequency, then a pressure pulse would have traveled to the closed end of the pipe and back to the open end before another pulse could be initiated. Recall that the pressure pulse was inverted as it came off of the closed end of the pipe. If this inverted pressure pulse encounters a new pulse, there will be destructive interference.
How could it destructively interfere with another pulse if it travels to and back before another pulse can be initiated?
A closed pipe cannot vibrate twice the fundamental frequency. Why? If we were at twice the fundamental frequency, then a pressure pulse would have traveled to the closed end of the pipe and back to the open end before another pulse could be initiated. Recall that the pressure pulse was inverted as it came off of the closed end of the pipe. If this inverted pressure pulse encounters a new pulse, there will be destructive interference.
How could it destructively interfere with another pulse if it travels to and back before another pulse can be initiated?