A model for high‐frequency acoustic backscatter from gas bubbles in sandy sediments at shallow grazing angles

Frank A. Boyle; Nicholas P. Chotiros

doi:10.1121/1.413645

A model for high‐frequency acoustic backscatter from gas bubbles in sandy sediments at shallow grazing angles

The Journal of the Acoustical Society of America ◽

10.1121/1.413645 ◽

1995 ◽

Vol 98 (1) ◽

pp. 531-541 ◽

Cited By ~ 20

Author(s):

Frank A. Boyle ◽

Nicholas P. Chotiros

Keyword(s):

High Frequency ◽

Gas Bubbles ◽

Acoustic Backscatter ◽

Grazing Angles ◽

Sandy Sediments

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Bistatic acoustic scattering from trapped gas bubbles in sandy sediments

The Journal of the Acoustical Society of America ◽

10.1121/1.411176 ◽

1994 ◽

Vol 96 (5) ◽

pp. 3219-3219

Author(s):

Frank A. Boyle ◽

Nicholas P. Chotiros

Keyword(s):

Acoustic Scattering ◽

Gas Bubbles ◽

Trapped Gas ◽

Sandy Sediments

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A multivariate analytical method to characterize sediment attributes from high-frequency acoustic backscatter and ground-truthing data (Jade Bay, German North Sea coast)

Continental Shelf Research ◽

10.1016/j.csr.2016.12.011 ◽

2017 ◽

Vol 138 ◽

pp. 65-80 ◽

Cited By ~ 1

Author(s):

Manuela Biondo ◽

Alexander Bartholomä

Keyword(s):

North Sea ◽

Analytical Method ◽

High Frequency ◽

Acoustic Backscatter ◽

Jade Bay ◽

Ground Truthing ◽

Sea Coast ◽

North Sea Coast

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Effects of Noise and Absorption on High Frequency Measurements of Acoustic-Backscatter from Fish

International Journal of Oceanography ◽

10.1155/2015/589463 ◽

2015 ◽

Vol 2015 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Masahiko Furusawa

Keyword(s):

Measurement Error ◽

Environmental Conditions ◽

High Frequency ◽

Signal To Noise Ratio ◽

Target Strength ◽

Acoustic Backscatter ◽

Signal To Noise ◽

Absorption Coefficients ◽

Frequency Measurements ◽

Multiple Frequencies

Quantitative echosounders operating at multiple frequencies (e.g., 18, 38, 70, 120, 200, 333, and 710 kHz) are often used to observe fish and zooplankton and identify their species. At frequencies above 100 kHz, the absorption attenuation increases rapidly and decreases the signal-to-noise ratio (SNR). Also, incomplete compensation for the attenuation may result in measurement error. This paper addresses the effects of the attenuation and noise on high frequency measurements of acoustic backscatter from fish. It is shown that measurements of a fish with target strength of −40 dB at 200 m depth are limited by SNR to frequencies up to about 100 kHz. Above 100 kHz, absorption coefficients must be matched to local environmental conditions.

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