Evidence
An International Whaling Commission survey found that underwater noise levels have doubled every ten years over the past six decades in some areas of the world’s oceans. A survey off Point Sur in California showed a 15 dB, or thirty-two-fold, increase in ocean noise between 1950 and 1975. — George Michelsen Foy, Zero Decibels, 354
Categorization
- XREF: connects to: Pre-industrial daily life exposed people to far lower sound levels than today — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 152; Shipping and sonar generate ocean noise intense enough to affect millions of square miles — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 355; Siren loudness has risen from 95 to 122 dBA over a century (+3 more)
Library Connections
- Shipping and sonar generate ocean noise intense enough to affect millions of square miles
#exemplifies(0.85) — George Michelsen Foy, Zero Decibels, 355