What challenge did silent film stars face when sound films were introduced?

The correct answer highlights a significant cultural shift that impacted silent film stars when sound films became prevalent. Silent film actors had established their personas and popularity based on their visual performances without the influence of their vocal qualities. When sound films emerged, audiences were taken aback by the actual voices of these stars, which often did not align with the image they had created in their minds. This discrepancy created a challenge for many former silent film icons, as their appeal was not merely based on acting ability but also on the mystique that surrounded their characters.

If a star had a voice that did not match their on-screen presence or that did not fit the expectations audiences had built, it could lead to a decline in their popularity. For example, a star known for their glamorous appearance might be disappointing if their voice was perceived as unrefined or unexpected. Thus, dealing with preconceived notions about their voices became a formidable challenge as the industry transitioned to sound. The need to adapt to this new reality affected their careers significantly and necessitated the rebranding of some performers to maintain their audience appeal.