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ocacoustics
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Some background information:
I am trying to cancel audio signal/noise in an enclosure I have constructed.
I have two identical woofers positioned opposite each other in the enclosure.
I have a very accurate sound level measurement microphone positioned between the two drivers.
I am using sound measurement software to initiate a sweep of the frequency response range of the woofers.
After several trials, the graphs of the speakers (unadjusted) proved to be almost perfectly the same, which leads me to believe that me hardware is not lacking in quality.
I then proceeded to switch the banana clip inputs from one of the speakers on the receiver/amp from red>red and black>black to red>black and black>red. I left the other speaker alone, and its inputs maintained their designed locations.
Next, I ran the same audio sweep tests and compared the graphs of the one speaker reversed tests to those of the "control" all speakers normal tests.
Oddly, the graphs of the speaker reversed test were rarely of less amplitude then the normal tests. Only in some places on the graph, was the reversed speaker test lower than the normal test, as I thought it should be.
In most cases on the graph, the amplitudes of the normal test were less then the reversed test
Correct me if I am wrong, but I thought that if I reversed the terminals on one speaker, and therefore changing the phase 180 degrees, it would yield considerably less noise in comparison with both speakers operating in phase.
My main goal here, is to cancel noise.
Can someone correct my theory and point me in the right direction?
Many thanks,
Sam
I am trying to cancel audio signal/noise in an enclosure I have constructed.
I have two identical woofers positioned opposite each other in the enclosure.
I have a very accurate sound level measurement microphone positioned between the two drivers.
I am using sound measurement software to initiate a sweep of the frequency response range of the woofers.
After several trials, the graphs of the speakers (unadjusted) proved to be almost perfectly the same, which leads me to believe that me hardware is not lacking in quality.
I then proceeded to switch the banana clip inputs from one of the speakers on the receiver/amp from red>red and black>black to red>black and black>red. I left the other speaker alone, and its inputs maintained their designed locations.
Next, I ran the same audio sweep tests and compared the graphs of the one speaker reversed tests to those of the "control" all speakers normal tests.
Oddly, the graphs of the speaker reversed test were rarely of less amplitude then the normal tests. Only in some places on the graph, was the reversed speaker test lower than the normal test, as I thought it should be.
In most cases on the graph, the amplitudes of the normal test were less then the reversed test
Correct me if I am wrong, but I thought that if I reversed the terminals on one speaker, and therefore changing the phase 180 degrees, it would yield considerably less noise in comparison with both speakers operating in phase.
My main goal here, is to cancel noise.
Can someone correct my theory and point me in the right direction?
Many thanks,
Sam
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