In New Hampshire and a few other states it is illegal to record audio from other people without permission. I know because I was part of a team building a soci

In New Hampshire and a few other states it is illegal to record audio from other people without permission. I know because I was part of a team building a social network (CenceMe) that shared sensor data from phones so people could see what others were doing. We wanted to use machine learning on audio and aside from the fact that it would have greatly reduced phone battery life we found it was illegal in the state we were doing experiments in.