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SAS slides for AK presentation

SAS slides for AK presentation. Slide background/format omitted (accidently by ajm. ;-) ). Gunderboom AFB Technology. Sound Attenuation System. First used by Underwater Construction, Inc. in Alaska during the late 1980’s to surround ship demolition projects & harbor deepening detonations.

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SAS slides for AK presentation

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  1. SAS slides for AK presentation Slide background/format omitted (accidently by ajm. ;-) )

  2. Gunderboom AFB Technology Sound Attenuation System • First used by Underwater Construction, Inc. in Alaska during the late 1980’s to surround ship demolition projects & harbor deepening detonations. • Intended as suspended sediment & debris control booms, observations indicated a certain level of attenuation resulted by the nature of the fibrous material.

  3. Gunderboom AFB Technology Sound Attenuation System

  4. Gunderboom AFB Technology Sound Attenuation System Caltrans Pile Driving Installation Project (PDIP) Location: Oakland Bay, Calif. Problems: • Concussive force of driving 8 ft diameter piles deleterious to fish populations. • Damaging affects occur at 190 dB for marine mammals, fish, as low as 170 dB for fish with swim bladders.

  5. Gunderboom AFB Technology Sound Attenuation System MENCK MHU 1700 ~1.2 Million Ft Pounds Hammer for Driving 8’ Piles

  6. Gunderboom AFB Technology Sound Attenuation System Gunderboom Sound Attenuation Framed-Support Assembly

  7. Gunderboom AFB Technology Sound Attenuation System Top view of installed system Operational View

  8. Gunderboom AFB Technology Sound Attenuation System

  9. Performance of Caltrans GUNDERBOOM SAS

  10. Gunderboom AFB Technology Sound Attenuation System Technology Application Summary • Effective suppression of explosive shock waves. • Demonstrated attenuation of Pile Driving sound energy. • Adaptable for various applications, frequencies and pressure ranges. • Low cost in relationship to suppression and attenuation levels achieved.

  11. Gunderboom AFB Technology Sound Attenuation System Prototype SAS Development

  12. Gunderboom AFB Technology Sound Attenuation System • Reusable rugged design • Works in high current velocity areas • Consistent broad range frequency protection • Minimal additional support equipment needed in field applications • Ease of field installation for batter and vertical pile driving applications

  13. Gunderboom AFB Technology Sound Attenuation System

  14. Gunderboom AFB Technology Sound Attenuation System Prototype SAS 10 kHz results

  15. Gunderboom AFB Technology Sound Attenuation System • Calibrated for 10 kHz sound source – based on test tank size • Average of over 43 dB reduction at a Source Level of 174 dB re mPa @ 1 meter • Overall sound reduction flowing Transmission Loss adjustment of over 95% • Testing by Chase Ocean Engineering Laboratory at the University of New Hampshire

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