游戏/互动 Game / interactive demo demo
Sirenfall：浏览器民防警报场景 Sirenfall: a browser civil-defense siren scene
雨夜里拉下闸，听浏览器实时合成的民防警报。 Pull the breaker on a rainy night and hear a siren synthesized in the browser.
详细介绍Details
纯浏览器民防警报场景：雨夜庇护所窗外城市，拉闸后警报塔用 Web Audio 实时合成双音（非录音）。源码单 HTML、MIT；另有 how-it-works 说明页。 A free browser scene: rainy city outside a shelter window; pull the breaker and a civil-defense siren spins up — synthesized live in Web Audio, not a recording. Single-file MIT source; how-it-works page included.
适合学什么What to learn
- 游戏/互动 Game / interactive
可直接玩或操作的教学游戏与 WebGL 演示。 Teaching games and WebGL demos you can play in the browser.
- demo demo
该类型下收录的公开 HTML 页面。 Public HTML pages listed under this type.
为什么推荐Why we recommend it 公开可玩；雨雷是录音，警报音实时合成。来自 Hacker News。 Publicly playable; rain/thunder are recordings, the siren is live synthesis. From Hacker News.
核验记录：来源、抓取与截图说明Verification log: sources, checks, and captures
Show HN（item 49556678）。Show HN (item 49556678).
