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OUR PART #: OXFORD-DEBUZZER-NAT
The Oxford DeBuzzer is divided into two stages: Detection and Removal. Buzz removal is usually accomplished using a comb filter ... Read more
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The Oxford DeBuzzer is divided into two stages: Detection and Removal.
Buzz removal is usually accomplished using a comb filter. The comb filter has many tight notches that eliminate the fundamental frequency and associated harmonics of the buzz. For this process to work well, the fundamental frequency must be very accurately determined.
The DeBuzzer has several ways of helping isolate the fundamental frequency.
First is the Peak Profile that is displayed above the central rotary control, which shows the strength of a given nominal frequency in the input signal. Second is the large FFT display which accentuates any frequency components that are consistently present, making them stand out in the plot. It will automatically mark the three highest peaks found, and you can set the nominal frequency by clicking one of the peaks on the graph.
The third method of isolating the fundamental frequency is a tone generator. In the same way as you can tune a guitar, as you home into the fundamental, the beat frequency between the tone and the fundamental will become slower and slower the closer you get.
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