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An Autonomous Hydroacoustic System for studying long-term scattering variability

Szczucka J., Groza K., Poraziński K.

Oceanologia

2002

No. 44 (1)

111-122

A new instrument, an Autonomous Hydroacoustic System, was designed to probe a water column acoustically from the bottom to the sea surface. It is capable of operating from a depth of 100 m self sufficiently for up to 10 days. A brief description of its construction and electronic design is provided. Preliminary results from the first field study consisting of a 90-hour series of backscattering measurements are presented.

Acoustic properties of the Pomeranian Bay bottom sediments

Tęgowski J., Klusek Z.

Oceanologia

1999

No. 41 (3)

475-487

The properties of bottom backscattered signals in the Pomeranian Bay have been investigated using a one-frequency single beam echosounder working at a central frequency of 30 kHz. The backscattering strength, time of reverberation and attenuation coefficient in sediments were estimated and mapped for the whole area. The other purpose of the investigations was to verify the acoustic one-frequency multiparametric method in order to determine the sediment-type distribution in the Pomeranian Bay. This method was found as useful tool for sediment identification in the study area.