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Tuesday, July 31, 2012
Joan La Roda 07/31/12 12:40 PM,This is the first in a three-part series on phase alignment. Additional segments of the series are available here. FFT based field measurement systems have made it possible for us to do phase alignment at fixed installations as well as at live events, where every venue demands a different approach. This is particularly important these days, since mid-high boxes are often flown and subwoofers remain on the ground, meaning that phase differences at the listener location can be very significant.… View this story
Filed in: Live Sound • Feature • Poll • Loudspeaker • Manufacturer • Signal • Sound Reinforcement • System • Audio -
Friday, October 01, 2010Joan La Roda 10/01/10 12:30 PM, 0 CommentsIn the previous two segments of this series we discussed phase and polarity, what causes phase to vary, what is meant by phase alignment, coherence curves, and we took a look at the first of three illustrative examples. If you haven’t yet read the first two articles in the series, which are available here, I’d urge you to do so. If you’re up to speed and ready to continue, let’s take a look at the rest of our examples Example… View this story
Filed in: Live Sound • Feature • Poll • Line Array • Loudspeaker • Mixer • Sound Reinforcement • System • Audio -
Monday, September 27, 2010
Joan La Roda 09/27/10 02:15 PM, 0 CommentsIn the first part of our series, we took a look at what exactly phase and polarity are, what causes phase to vary, and what is meant by phase alignment. Coherence Curve The coherence curve that Fast Fourier Transform based measurement systems provides indicates the probability that the measurement is reliable. It’s very common to find a coherence curve (ranging from 0 to 1, or from 0% to 100%, depending on the measurement system) with low values in part of… View this story
Filed in: Live Sound • Feature • Poll • Loudspeaker • Mixer • Signal • Sound Reinforcement • System • Audio
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