The rapid development of smart media technology is reshaping the communication ecosystem while also giving rise to concerns about the "soundscape amnesia" of cities. The soundscape memories that carry regional characteristics and collective emotions are being overshadowed by technologically homogenised content. As a cultural anchor against "amnesia," the professional value of broadcasting and hosting is rooted in a three-pronged system of "technique-function-humanities": The soundscape encoding techniques centred on dialect phonetics and emotional narrative control lay the foundation for memory, the functional role of public translation fosters collective identity and weaves a memory network, and the humanistic core guided by historical context interpretation and cultural archiving illuminates the path of inheritance, together forming the fundamental resilience against technological replacement. However, broadcast hosting currently faces three major challenges: algorithmic monopolies lead to the standardisation of soundscapes and the loss of emotional warmth; simulacrum-based dissemination erodes professional essence and causes cognitive biases; and technological alienation weakens its agency in soundscape narratives. The way out lies in upholding tradition while innovating: deepening the art of soundscape encoding through cultural decoding and narrative innovation to build professional barriers that technology cannot replicate; activating the humanistic communication field to balance the soundscape ecology under the logic of traffic; and establishing a human-machine collaboration system to clarify the tool attributes of technology and the professional subjectivity of the host. Through these practices, broadcasting and hosting preserve the authenticity and diversity of urban soundscape memories in the midst of technological waves, showcasing the professional depth of "broadcasting as an academic discipline" while affirming its irreplaceable role as a guardian of cultural memory and its sustainable development prospects, thereby providing crucial support for humanistic heritage in the technological era.

Yuting Ma. Research on Professional Resilience Building and Anti-Substitution Strategy Development in Broadcasting and Hosting. Academic Journal of Humanities & Social Sciences (2025), Vol. 8, Issue 8: 1-7. https://doi.org/10.25236/AJHSS.2025.080801.

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