Task 2 Eavesdropping Equipment

7/27/2019 Task 2 Eavesdropping Equipment

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Task 2 Eavesdropping Equipment

Autonomous Hydrophones - Where are hydrophones located ?The Bioacoustics Research Program has developed an autonomous acoustic

recording device for deployment on the ocean floor at depths up to 6,000 m. The

device, known as a "pop-up," includes a microprocessor, hard disk for data storage,

acoustic communications circuitry, and batteries, all sealed in a single 17-inch glass

sphere. An external hydrophone is connected to the internal electronics through a

waterproof connector. At the conclusion of a mission, the positively buoyant sphere

separates itself from its anchor and "pops up" to the surface for retrieval. As of the end

of 2008, BRP pop-ups have been successfully deployed in hundreds of applications in

over twenty countries worldwide.

The communications processor monitors the acoustic signal from the

hydrophone, and controls the burn wire release mechanism and the piezoelectric pinger

that is used to acknowledge receipt of an acoustic signal from a surface vessel. It also

can receive an "internal release" signal from the data acquisition computer. When an

acoustic or internal release signal is detected, the communications processor applies a

voltage to the burn wire, which then corrodes within 5 minutes, releasing the pop-up

from its anchor. When an acoustic query signal is detected, the computer transmits an

acoustic response via the pinger.


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Figure 2. The major functional components of a pop-up.

Other Equipment:What are camera traps and what have they been used for?A camera trap is a remotely activated camera that is equipped with a motion

sensoror an infrared sensor, or uses a light beam as a trigger. Camera trapping is a

method for capturing wild animals on film when researchers are not present, and has

been used in ecological research for decades. In addition to applications in hunting and

wildlife viewing, research applications include studies of nest ecology, detection of rare

species, estimation of population size and species richness, as well as research on

habitat use and occupation of human-built structures.

Camera traps, also known as trail cameras, are used to capture images of

animals in the wild with as little human interference as possible. In recent decades, with

advancements in the quality of camera equipment, this method of field observation has

become more popular among researchers. Hunting has played an important role indevelopment of camera traps, since hunters like to use them to scout for game. These

hunters have opened a commercial market for the devices which have led to many

improvements over time.
http://en.wikipedia.org/wiki/Camerahttp://en.wikipedia.org/wiki/Motion_sensorhttp://en.wikipedia.org/wiki/Motion_sensorhttp://en.wikipedia.org/wiki/Infrared_sensorhttp://en.wikipedia.org/wiki/Image_triggerhttp://en.wikipedia.org/wiki/Animalhttp://en.wikipedia.org/wiki/Huntinghttp://en.wikipedia.org/wiki/Ecologyhttp://en.wikipedia.org/wiki/Trail_camerahttp://en.wikipedia.org/wiki/Trail_camerahttp://en.wikipedia.org/wiki/Ecologyhttp://en.wikipedia.org/wiki/Huntinghttp://en.wikipedia.org/wiki/Animalhttp://en.wikipedia.org/wiki/Image_triggerhttp://en.wikipedia.org/wiki/Infrared_sensorhttp://en.wikipedia.org/wiki/Motion_sensorhttp://en.wikipedia.org/wiki/Motion_sensorhttp://en.wikipedia.org/wiki/Camera


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The great advantage of camera trapping is that they can record very accurate

data without the animal being captured. These data are superior to human

observations, because they can be reviewed by other researchers. They minimally

disturb wildlife and can replace the use of more invasive survey and monitoring

techniques such as live trap and release. They operate continually and silently, provide

proof of species presence in an area, can teach what prints and scats go with which

species, can provide evidence for management and policy decisions and policies, and

are a cost effective monitoring tool. Infrared flash cameras have low disturbance and

visibility. Besides olfactory and acoustic cues, camera flash may scare animals so that

they avoid or destroy camera traps. The major alternative light source is infrared, which

is usually not detectable by mammals orbirds.

Camera traps are also helpful in quantifying the number of different species in an

area; this is a more effective method than attempting to count by hand every individual

organism in a field. It can also be useful in identifying new or rare species that have yet

to be well documented. By using camera traps, the well-being and survival rate of

animals can be observed over time.

Camera traps are helpful in determining behavioral and activity patterns of

animals, such as which time of day they visit mineral licks.

Camera traps have revolutionized wildlife research and conservation, enabling

collection of photographic evidence of rarely seen and often globally endangered

species, with little expense, relative ease, and minimal disturbance to wildlife. Camera

traps can document wildlife presence, abundance, and population changes, particularly

in the face of deforestation and habitat destruction. Camera traps enable collection of

baseline population data on elusive mammals and birds where only estimates and

often just guesses were possible before. Camera traps are increasingly being used

to raise conservation awareness worldwide, with Non-governmental

organizations (NGO)s embracing the tool as a powerful way of reaching out to the

public through electronic media. Wildlife conservation groups such as Panthera, Wildlife

Conservation Society (WCS), World Wildlife Fund (WWF) have found camera trap
http://en.wikipedia.org/wiki/Olfactoryhttp://en.wikipedia.org/wiki/Flash_(photography)http://en.wikipedia.org/wiki/Mammalhttp://en.wikipedia.org/wiki/Birdhttp://en.wikipedia.org/wiki/Mineral_lickhttp://en.wikipedia.org/wiki/Endangered_specieshttp://en.wikipedia.org/wiki/Endangered_specieshttp://en.wikipedia.org/wiki/Non-governmental_organizationhttp://en.wikipedia.org/wiki/Non-governmental_organizationhttp://en.wikipedia.org/wiki/Pantherahttp://en.wikipedia.org/wiki/Wildlife_Conservation_Societyhttp://en.wikipedia.org/wiki/Wildlife_Conservation_Societyhttp://en.wikipedia.org/wiki/World_Wildlife_Fundhttp://en.wikipedia.org/wiki/World_Wildlife_Fundhttp://en.wikipedia.org/wiki/Wildlife_Conservation_Societyhttp://en.wikipedia.org/wiki/Wildlife_Conservation_Societyhttp://en.wikipedia.org/wiki/Pantherahttp://en.wikipedia.org/wiki/Non-governmental_organizationhttp://en.wikipedia.org/wiki/Non-governmental_organizationhttp://en.wikipedia.org/wiki/Endangered_specieshttp://en.wikipedia.org/wiki/Endangered_specieshttp://en.wikipedia.org/wiki/Mineral_lickhttp://en.wikipedia.org/wiki/Birdhttp://en.wikipedia.org/wiki/Mammalhttp://en.wikipedia.org/wiki/Flash_(photography)http://en.wikipedia.org/wiki/Olfactory


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videos and photos to be an important part of campaigns to save threatened or

endangered species.

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Task 2 Eavesdropping Equipment