1. Acoustical oceanography and DEIMOS
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

13. Acoustical analysis from bottom up

15. Fish Swim Bladder reflects backscatter

17. 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?

19. Daily cycles

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

21. Possible species

22. More species

23. Thank You
Steve Seal
LAUSD