In which lab is Facebook developing technology to allow deaf people to hear through their skin?

Facebook, now known as Meta, is developing technology aimed at enabling deaf individuals to perceive sound through their skin at a lab known as Building 8. This facility was specifically established to explore innovative technologies and projects that enhance human communication and connectivity. The focus on utilizing the skin as a medium for sound perception aligns with Meta’s broader mission to leverage technology to improve accessibility and inclusivity for individuals with hearing impairments.

The other locations mentioned, such as Tech Park, Innovation Hub, and Research Facility, may engage in various technological advancements or research initiatives, but Building 8 stands out for its specific emphasis on projects like the one designed to allow deaf people to "hear" through tactile sensations, making it the correct answer in this context.