The premiere Broadway production of "The Importance of Being Earnest" opened at the Lyceum Theater (New York City) on April 22, 1895, ran for 12 performances and has been revived in New York City eight times since as of 2010.
(at around 1h 40 mins) just after Miss Prism says 'there is the lady who can tell you who you really are', a microphone can be seen at the top of the screen.