# Voice Arena

- **Event:** [OpenAI Voice Hack Night](https://cerebralvalley.ai/e/openai-voice-hack-night)
- **When:** Wed, May 27 at 3:00 – 9:00 PM (PDT)
- **Where:** 1515 3rd Street, San Francisco, CA
- **Team:** [Yi Zu](https://cerebralvalley.ai/u/yizucodes)
- **Demo video:** https://www.loom.com/share/5575a8464132400b8f2894c72bda475b
- **Gallery:** https://cerebralvalley.ai/e/openai-voice-hack-night/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/openai-voice-hack-night/hackathon/gallery/22

Voice Arena is a realtime healthcare voice-tool firewall that demonstrates how voice agents with tool access can leak sensitive patient data when raw tool responses reach the model. It solves the gap left by prompt-only guardrails, which still expose secrets to the model and ask it not to repeat them, by enforcing a strict runtime data boundary so that unauthorized protected healthcare information (PHI) never enters the model’s response context.

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Markdown version of https://cerebralvalley.ai/e/openai-voice-hack-night/hackathon/gallery/22. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt