Specialty Devices, Inc., working with the Gas Hydrate Research Consortium directed by the Mississippi Minerals Resource Institute, has developed and installed a Severe Storm Monitoring System. The MAD SEA Storm Monitor was installed in approximately 1,000 meters of water depth at Mississippi Canyon 118 in the Gulf of Mexico on June 12, 2006. The Storm Monitor is to be recovered in November of 2006 at the conclusion of the hurricane season in the Gulf of Mexico. This web-page discusses the MAD SEA Storm Monitor and its capabilities. The Storm Monitor can also be used for marine mammal research and for monitoring man made acoustic signatures.


Develop a long term acoustic storm monitoring system and have it in place for the 2006 hurricane season in the Gulf of Mexico.


Monitoring of storm induced sound requires estimation of the frequency domain of interest, the dynamic range of amplitudes versus frequency and an understanding of natural and man made background noise which may interfere. Ideally, we would be able to measure calm sea natural back ground levels, be unaffected by man made interference and still be capable of recording sound levels resulting from a maximum storm event directly over the monitor location. Our frequency spectrum of interest is dictated by the sound generation spectrum from storms, by the acoustic transmission characteristics of the sea and by the frequency spectrum that provides the best indicator of storm intensity.

Main ProcessorCF2
Sampling Rate2 kHz
Resolution16 bits
Main Power Supply6 volt and 12 vdc  Alkaline batteries with 15 A-H
Power Supply Operational Life291 days with standard battery pack
Anti-Alias Filter1000 Hz low pass 2 pole
Hydrophone Freq. Range1 Hz to 10,000 Hz
Hydrophone Sensitivity-101 db re 1 uBar
Total preamplifier/Amplifier gain72.9 db
Data storage Capacity180 Days can be increased to 720 days
Data interfaceserial high speed
Data TransferCF flash card
Operational Depth1,500 meters
In Water Weight ( w/o cage)6 lbs.