This isn't a new idea, it's just a "portable" version of the anti-vulgar-speech system you see at many sporting stadiums that play back delayed recordings of cr

This isn't a new idea, it's just a "portable" version of the anti-vulgar-speech system you see at many sporting stadiums that play back delayed recordings of crowd noise when vulgar chants (i.e. "bullshit! bullshit!" after a bad call) start.