Paranormal State
...that the marketing campaign for the reality television series Paranormal State featured the first commercial use of directional audio in a billboard?
...that the marketing campaign for the <a href="./Reality_television" id="mwEqY" rel="mw:WikiLink" title="Reality television">reality television series</a> <i id="mwEqc"><b id="mwEqg"><a href="./Paranormal_State" id="mwEqk" rel="mw:WikiLink" title="Paranormal State">Paranormal State</a></b></i> featured the first commercial use of <a href="./Sound_from_ultrasound" id="mwEqo" rel="mw:WikiLink" title="Sound from ultrasound">directional audio</a> in a billboard?