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There is a Swiss startup called Distran (http://www.distran.ch/) which develops ultrasound cameras. They also have a spherical version which looks really cool and allows 360deg sight, unfortunately I cannot find anything about that one on the website anymore.

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A finnish one too: http://www.nlacoustics.com/ Can someone with more expertise explain the differences between the many companies in this field?

We all have a bit of a different way of approaching the problem and our target market differs somewhat. You can use this technology for a lot of different things, not just the obvious use cases. We're still looking at a lot of applications, so the clearer product differentiation is something that will form as time goes by.

- Kai @ nlacoustics.com

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