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The story of in-ear monitors is complex and nuanced, with multiple figures contributing to their development. Surprisingly, no single inventor can claim sole credit, as the design includes innovations from various sources over decades.
One of the earliest precursors was Steven Ambrose, who in 1965 at the age of 13 embedded tiny speakers into bubblegum to listen to music discreetly. Over subsequent years, he refined the concept, making custom molds for notable artists like Diana Ross and Simon & Garfunkel.