RESEARCH BASE
Search 3,721 documents across 34 fields — every claim tier-rated by evidence
3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.
198 results for "sound pressure level" — page 4 of 10
M_5_23 — Post-Glacial Flooding and Submerged Archaeological Landscapes
Between the Last Glacial Maximum (LGM, c. 26,500–19,000 years ago) and approximately 6,000 years ago, global mean sea level rose by approximately 120–130 m, drowning continental shelves that had been habitable land. The
M_3_03 — Archaeoacoustics and Acoustic Properties of Ancient Structures
Archaeoacoustics is the study of the acoustic properties of ancient structures, investigating whether builders intentionally designed ritual, ceremonial, and sacred spaces to produce specific sound effects — resonance, e
M_2_08 — Underwater Structures of Lake Titicaca & Japan
Multiple significant underwater stone formations have been documented in two distant but thematically related regions: Lake Titicaca (Bolivia/Peru) and the waters surrounding the southern Japanese Ryukyu Islands.
U_1_00 — Music Sound Performance: Subfolder Summary
X_5_25 — Music Therapy: Sound, Rhythm, and Neurological Healing
Music therapy — the clinical and evidence-based use of music interventions by credentialed professionals to accomplish individualized goals within a therapeutic relationship — has emerged from ancient intuition into a mo
X_3_06 — Radiology and Medical Imaging
Medical imaging — the visualization of internal body structures for diagnosis and treatment — has transformed medicine from a discipline dependent on external observation and invasive exploration to one with extraordinar
C_1_15 — Oral Tradition Fidelity: How Accurately Do Myths Preserve Historical Facts?
Oral traditions have long been treated with skepticism by historians trained in text-based source criticism, yet mounting evidence suggests that under certain conditions, oral narratives can preserve accurate information
C_4_05 — Australian Aboriginal Dreamtime Synthesis
This document examines Australian Aboriginal Dreamtime Synthesis, a topic within the Global Traditions research area. Key areas of investigation include The Deep Time Record, Diversity — Not "A Culture" but a Continent o
C_4_10 — Mapuche and Patagonian Traditions
The Mapuche people of south-central Chile and southwestern Argentina represent one of the most remarkable cases of indigenous resistance in world history — the only major American group never conquered by the Inca Empire
C_5_32 — Flood Myths: Universal Deluge Traditions Across Civilizations
Flood myths appear in over 200 cultures across every inhabited continent, making the "Great Deluge" one of the most universal narrative motifs in human mythology. The oldest written version appears in the Sumerian Eridu
ZF_2_09 — Fisheries Science and Overfishing
Fisheries science studies the dynamics of fish populations and the management of their exploitation, while overfishing — harvesting fish faster than they can reproduce — has emerged as one of the most pressing threats to
ZF_2_12 — Deep-Sea Gigantism and Abyssal Ecology
Deep-sea gigantism (also called abyssal gigantism) is the observed tendency for certain deep-sea invertebrates and some vertebrates to attain body sizes far exceeding those of their shallow-water relatives — a pattern do
ZF_3_17 — Anthropogenic Ocean Noise Pollution
Anthropogenic ocean noise — sound from shipping, seismic surveys, military sonar, construction, and industrial activity — has increased ambient ocean sound levels by an estimated 32-fold (15 dB) in many ocean regions sin
ZF_3_08 — Sunda Shelf and Southeast Asian Submerged Landscapes
The Sunda Shelf (or Sundaland) is one of Earth's largest continental shelves — an area of ~1.8 million km² (larger than the Indian subcontinent) that connects the islands of Borneo, Sumatra, Java, and Bali to peninsular
ZF_5_18 — Wave & Tidal Energy
Wave and tidal energy — the extraction of electrical power from ocean surface waves and gravitational tidal flows — represent a vast but largely untapped renewable energy resource: the International Energy Agency (IEA) e
ZF_5_16 — Ocean Observation Networks: Global Monitoring of the Marine Environment
Ocean observation networks constitute the global infrastructure for monitoring the physical, chemical, and biological state of the world's oceans in near-real-time. The centerpiece of modern ocean observation is the Argo
ZF_5_08 — Coastal Geomorphology: Erosion, Beaches, and Barrier Islands
Coastal geomorphology is the study of landforms at the interface of land and sea — a dynamic zone shaped by the constant interaction of waves, tides, currents, wind, rivers, geology, biology, and increasingly by human ac
ZF_5_06 — Ocean Energy: Tidal Power, Wave Energy, and OTEC
Ocean energy encompasses a family of renewable energy technologies that harvest the ocean's vast stores of kinetic, thermal, and chemical energy — including tidal power (predictable tidal flow and range), wave energy (wi
ZF_4_12 — Underwater Acoustics and the SOFAR Channel
Sound is the dominant long-range information carrier in the ocean — electromagnetic radiation (light, radio) is rapidly absorbed in seawater, but sound can travel thousands of kilometers with remarkably little loss, maki
ZF_4_01 — Ocean Acidification and Marine Chemistry
The global ocean has absorbed approximately 30% of anthropogenic CO₂ emissions since the Industrial Revolution and over 90% of excess heat from the enhanced greenhouse effect, making it the planet's primary climate buffe
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