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RE: and a lot of lobing.

"There are cases such as line arrays where lobing is actually a desirable effect by placing many identical drivers in a column which deliberately provokes lobing. This is done to convert a spherical waveform of a single driver into a cylindrical one, with a narrow, vertical direction. The main reason people started building such line arrays was to be able to intelligibly transmit human speech in highly reverberant spaces like churches by avoiding sound being projected onto ceilings and floors.

This only works in a narrow frequency band and line arrays tend to be highly collared when listened to off axis."

"Line arrays have uneven sound quality and response in the middle and high frequencies, despite what their manufacturers would want you to hear. That's because they usually have discontinuities at the edges of each driver unit, and because they don't go from floor to ceiling. All this results in interferences that cloud up the sound quality. It's simple to hear: just play some pink noise on the speaker, and listen up and down from the middle of the line array. You will notice a swishing in the sound, proving that the spectrum changes. Problem is that depending on which row you sit in a tiered theaters, you will get a different experience, none if which is probably right in the first place."


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