In Iain M. Banks' novel "Surface Detail," the narrative explores a world filled with intense experiences that challenge the characters' perceptions and realities. The mention of needing ear defenders suggests a chaotic environment where noise overwhelms, highlighting the tumultuous nature of the setting. This detail indicates that the characters are immersed in a high-stakes situation that requires protection against sensory overload.

The reference to the "swirling slipstream" causing havoc to hairstyles serves as a metaphor for the disruption in the characters' lives. It emphasizes the instability and unpredictability of their circumstances, suggesting that superficial concerns, like personal appearance, become irrelevant in the face of greater challenges. Overall, the quote reflects the broader themes of chaos and transformation present in Banks’ work.