Any speakers with cardioid response in vertical as well?

[Bwaslo]

Cardioid radiation pattern at low frequency is a something a lot of speakers designersare pursuing, but it seems only in the horizontal pattern. Are there any designs that are also cardioid in vertical pattern?

While that would no doubt have costs in SPL capability, wouldn't it be desirable for avoiding floor and ceiling reflections? Granted that isn't considered a major problem by most (other than Roy Allison), but still something that could differentiate from all the similar cardio+waveguide boxes that are popping up.

 

[kharan]

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[Bwaslo]

Are there any spins or pattern curves for it?

 

[BenB]

A vertical cardioid wont reduce floor and ceiling reflections much at all. It could reduce the higher order reflections (ex: floor-to-ceiling-to-floor-to-ceiling-to-listener).
The first floor reflection typically has an angle that's only about 30 degrees below horizontal, and the ceiling only 40 or 45 degrees above horizontal (depending on speaker height and listening distance). If you want to significantly reduce the first vertical reflections, you need a beam much narrower than a cardioid pattern.

 

[staticV3]

Cardioid radiation pattern at low frequency is a something a lot of speakers designersare pursuing, but it seems only in the horizontal pattern. Are there any designs that are also cardioid in vertical pattern?

LF directivity doesn't really differentiate between Hor and Ver.

Se e.g:






All of these (as well as any other speaker) are equally as cardioid in the bass Hor and Ver.

 

[sigbergaudio]

Came here to say the same as @staticV3. One might assume it's only horizontal given that the restrictive / passive cardioid designs have the cardioid ports on the side, but if you look at the graphs it's actually effective in the vertical plane as well both in our design and most others.