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[Mal Brown]

I'm just curious.

Thx!

[Jonathan Goodall]

That type of array works best in segments, it makes it easier to use digital manipulation to squeeze the output into a defined area (eg glass atrium). 

[Caleb Dueck]

I'm just curious.

Thx!

I believe it's a mix of all-pass filters, delay shading, gain shading, and some drivers out of phase to actively "kill" lobes. 

[Landon Lewsaw]

That type of array works best in segments, it makes it easier to use digital manipulation to squeeze the output into a defined area (eg glass atrium). 

Lemon arrays are the next big thing...

[Tim McCulloch]

I'm just curious.

Thx!

A whole lime would be a lime array, as the individual segments make up the whole.

But there are 3 vertical arrays that use electronics to move things - EAW's ANYA/ANNA, Martin's MLA, and d&b's G/K SL series.  Each implements time, amplitude and equalization in different ways to achieve their end result.

I'm reasonably certain that all of the manufacturers have white papers or other discussion of their technology...

[David Sturzenbecher]

A whole lime would be a lime array, as the individual segments make up the whole.

But there are 3 vertical arrays that use electronics to move things - EAW's ANYA/ANNA, Martin's MLA, and d&b's G/K SL series.  Each implements time, amplitude and equalization in different ways to achieve their end result.

I'm reasonably certain that all of the manufacturers have white papers or other discussion of their technology...

Don’t forget nearly every steerable column speaker. Renkus Heinz Iconyx is the biggest player but there are many others.

[Tim McCulloch]

Don’t forget nearly every steerable column speaker. Renkus Heinz Iconyx is the biggest player but there are many others.

Would those be the lemon arrays that Landon was mentioning?

It's getting kind of citrus-y in here...

[Mike Caldwell]

Don’t forget nearly every steerable column speaker. Renkus Heinz Iconyx is the biggest player but there are many others.

The steerable columns I have worked with (Tannoy & Intellavox) were only "steerable" in the vertical pattern, and the control software lets say needed some streamlining!

[Helge A Bentsen]

Gsl/ksl is «steering on top of a connentional linearray». You can optimize it a bit, but it has it’s limits. You still need to calculate and pin it as a conventional system.
MLA/WP from Martin can be used as a «conventional» line array, but can be optimimized with great results. Still have to calc an pin it as a conventional system, but you can optimize coverage afterwards with great results.
EAW Adaptive can’t be used as a conventional line array, it has to be steered and has the most impressive performance I’ve ever used. Martin get’s close, but Adaptive can do some coverage stuff that’s amazing. Adaptive goes up at 0 degrees, you can fly it and adjust coverage afterwards. Huge time saver, a qualified rigger and stage hands can fly a system hours before you arrive to adjust trim levels and set coverage.

A friend of mine did audience sound for a tv show, live bands in an aircraft hangar.
During rehersal the tv bus called him on coms and asked when he’s going to turn on the PA. They couldn’t hear the bleed like they used to.

Disclamer: I haven’t personally used GSL/Anya, but I’ve used the other systems several times.

[Peter Morris]

I'm just curious.

Thx!

In its simplest form beam steering is done with delay. It can provide a virtually curve to the array as shown below, hence steer the sound.

As I understand EAW Anaya works more or like this as does their first version of this technology the DSA250. They also included a lot of addition features to ensure even optimized coverage across the audience area.

Systems such as Martin’s MLA, D&B array processing and AFMG’s FIR maker are slightly different. They are not really beam steering protocols.

They require the array to be physically curved, but optimize the performance on the listening plane.  They look at the vectors that describe the 3D performance of the drivers/speaker at all frequencies.– see one set of 3kHz vectors represented graphically below.

By modifying the delay, amplitude and phase of individual drivers or speakers you can optimise the arrivals on the listening plain.  This is done with some cleaver mathematical optimization algorithms that eventually generate a set of FIR filter tap coefficients. These are loaded in to the systems processors.

Given this amount of control they have with this approach they can also do limited beam steering.

[ProSoundWeb Community]