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Understanding Fish and Sound in the Ocean: Insights from DEIMOS Acoustical Research

Discover the fascinating world of acoustical oceanography through DEIMOS (Deep Echo-Integrating Marine Observatory System). This research explores how sound travels in water—800 times denser than air—and how it helps detect, map, and count aquatic species. Learn to analyze data streams from DEIMOS, recognizing patterns in sound reflections from fish swim bladders and various marine organisms. Our goal is to enhance our understanding of marine life densities and behaviors using sound technology. Thank you, Steve Seal, LAUSD, for your contributions to this research.

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Understanding Fish and Sound in the Ocean: Insights from DEIMOS Acoustical Research

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  1. Where are the Fish Acoustical oceanography and DEIMOS

  2. Sound levels • 20 db quiet bedroom • 40 db library • 60 db conversational speech • 90 db street traffic • 130 db jet engine • 140+ db pain threshold

  3. Sound in the Ocean • Water is 800 times more dense that air—so sound is intensified in ocean environments

  4. DEIMOS and MARS

  5. Deep Echo-Integrating Marine Observatory System (DEIMOS)

  6. Monterey Accelerated Research System (MARS)

  7. DEIMOS Transducer

  8. DEIMOS before deployment

  9. Deloyment

  10. Fisheries Acoustics • Uses sound to detect, map, and count aquatic species • Animals in the water are complicated scatterers of sound due to their shape, composition, curvature, and behavior.

  11. Fish finder screen

  12. Acoustical analysis from bottom up

  13. Fish Swim Bladder reflects backscatter

  14. Do your own analysis • Look at a data stream from the DEIMOS • Look for patterns and shapes in data • What do you think you are looking at? • What do you notice about the picture?

  15. Daily cycles

  16. Density of Species • Richer colors=Dense marine organisms • Cooler colors=Less dense organisms

  17. Possible species

  18. More species

  19. Thank You Steve Seal LAUSD

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