Temporal model of high‐frequency seafloor acoustic backscatter

1994 ◽  
Vol 96 (5) ◽  
pp. 3287-3287
Author(s):  
Christian de Moustier ◽  
Daniel Sternlicht
Keyword(s):  
High Frequency ◽  
Acoustic Backscatter ◽  
Temporal Model

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

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
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.

scholarly journals High‐frequency acoustic backscatter sea surface

1984 ◽  
Vol 75 (S1) ◽  
pp. S31-S31
Author(s):  
W. I. Roderick ◽  
R. K. Dullea ◽  
J. B. Chester
Keyword(s):  
High Frequency ◽  
Sea Surface ◽  
Acoustic Backscatter

scholarly journals The dance of the nanobubbles: detecting acoustic backscatter from sub-micron bubbles using ultra-high frequency acoustic microscopy

Nanoscale ◽  
2020 ◽  
Vol 12 (41) ◽  
pp. 21420-21428
Author(s):  
Michael J. Moore ◽  
Filip Bodera ◽  
Christopher Hernandez ◽  
Niloufar Shirazi ◽  
Eric Abenojar ◽  
...  
Keyword(s):  
High Frequency ◽  
Acoustic Microscopy ◽  
Acoustic Backscatter ◽  
Agarose Gel ◽  
Acoustic Microscope ◽  
Ultra High Frequency

Detection of the motion of individual nanobubbles and microbubbles in an agarose gel using an ultra-high frequency acoustic microscope.

scholarly journals Diel variation in high-frequency acoustic backscatter fromCochlodinium polykrikoides

2013 ◽  
Vol 134 (2) ◽  
pp. EL140-EL146 ◽  
Author(s):  
Tae-Hoon Bok ◽  
Jungyul Na ◽  
Dong-Guk Paeng
Keyword(s):  
High Frequency ◽  
Acoustic Backscatter ◽  
Diel Variation

Utilizing High-Frequency Acoustic Backscatter to Estimate Bottom Sand Ripple Parameters

2009 ◽  
Vol 34 (4) ◽  
pp. 431-443 ◽  
Author(s):  
Dajun Tang ◽  
K.L. Williams ◽  
E.I. Thorsos
Keyword(s):  
High Frequency ◽  
Acoustic Backscatter ◽  
Sand Ripple

Modeling high-frequency acoustic backscatter for remote sensing of oil under sea ice and oil encapsulated in sea ice

2015 ◽  
Vol 138 (3) ◽  
pp. 1744-1744 ◽  
Author(s):  
Dajun Tang ◽  
Derrell R. Jackson ◽  
Christopher Bassett ◽  
Andone C. Lavery
Keyword(s):  
Remote Sensing ◽  
Sea Ice ◽  
High Frequency ◽  
Acoustic Backscatter
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