Inventor <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Edwin_Armstrong" id="mwAQI" rel="mw:WikiLink" title="Edwin Armstrong">Edwin Armstrong</a> gives the first public demonstration of <a href="https://en.wikipedia.org/wiki/Frequency_modulation" id="mwAQM" rel="mw:WikiLink" title="Frequency modulation">FM</a> broadcasting in the United States at <a href="https://en.wikipedia.org/wiki/Alpine,_New_Jersey" id="mwAQQ" rel="mw:WikiLink" title="Alpine, New Jersey">Alpine, New Jersey</a>.