Acoustic survey in fishing is one of the research methods that can detect the presence of acoustic transducers . For example, Many pelagic fisheries are very Generally scattered over a broad ocean and difficulty to detect. Thus, the survey vessel with acoustic detector emits sound waves to estimate the density of plankton and fish shoal . Generally speaking , the transducer is one of the following, which is linked to an echo sounder in the vessel which records the shoals of fish as “marks” on a screen or paper trace. Then the density and number of marks are converted into biomass. 
One real case of acoustic survey was conducted in July 1993 to review pre-spawning concentration of autumn-spawning herring using a Simrad EK 500 38-kHz sounder and echo-integrator in the fisheries research vessel in Scotia FRV. The survey was based on the limit of herring densities in previous years. A transect spacing of 15 nautical miles (17.3 miles) was used. Data from the echo integrator were summed over at 15-min period (2.5n miles at 10 knots, 1 knot = 1.852 km / h). The echo sound provided approximately 2.5 * 10,000,000 measurements of fish population during acoustic survey of herring population. 
Acoustic survey est used for land animals like bats for bat habitat management. Acoustic survey is conducted to find out the occurrence and activity patterns  and other emerging features. Acoustic survey has an advantage since it can be carried out in a larger area.  Despite the drawbacks, acoustic survey remains an important tool to address many bat research monitoring.
- Jump up^ Marine Institute 2011 ArchivedOctober 4, 2011, at theWayback Machine.
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- Jump up^ Gehrt SD, and JE Chelsvig Species Specific Patterns of Activity in an Urban Landscape. Ecological Applications 14: 625-635
- Jump up^ Barclay, RMR 1999. Bats are not birds-a cautionary note on using echolocation calls to identify bats: Journal of Mammalogy 80: 290-296