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Supertopics:
Noise Pollution Miscellany

the mystery of the very-low-pitched worldwide hum      web

webhttps://theconversation.com/cracking-the-mystery-of-the-worldwide-hum-60296
authorGlen MacPherson
publicationThe Conversation
date2016-06-20

Subtopics:
The World Hum Map and Database Project
web

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