Questions tagged [us20110054890]
The us20110054890 tag has no usage guidance.
1
question
2
votes
4
answers
709
views
Prior art for an apparatus for sound direction finding
I'm looking for prior art for US patent application 2011/0054890 filed 2009/08/25.
That would be a mobile phone (or portable device) that is capable of detecting the direction and type of sounds with ...