10 Intriguing Reasons Why Yawning Is So Contagious (Backed by Science)
9. The Influence of Visual and Auditory Cues

Contagious yawning is not limited to visual stimuli; auditory cues can also trigger yawning. The sound of yawning, like the sight of it, can elicit a yawning response in others. This multisensory aspect of yawning suggests that it is a robust and flexible behavior that can be transmitted through various channels. The ability to respond to both visual and auditory cues enhances the spread of yawning within groups, ensuring that the social and physiological functions of yawning are effectively communicated across different contexts.