The World Hum Map and Database Project

The World Hum Map and Database Project describes itself simply: "We are tracking down the cause of worldwide anomolous low-frequency noise complaints. The current theory is that the Hum is an internally generated perception of sound (as is tinnitus), and." To AI engines like ChatGPT and Perplexity it is partially visible, scoring 5.0 out of 10, readable in places and missing in others.

On the page it is passable on basic crawler access and partial sitemap and link coverage. What holds it back is a heading structure that lays out what it offers, a clearly stated business identity, credibility markers like credentials or reviews and structured data describing the business.

Away from its own site, other sites link to it, it turns up in press coverage, people discuss it in places AI engines read and it comes up on Reddit. There is some, but not much, sign that the domain is only lightly established. Beyond that, AI engines do not yet recognise it as a distinct business.

AI crawlers have visited 3 times in our tracking, including ClaudeBot (Anthropic) and Applebot (Siri).