many types of wetland habitats

China, many types of wetland habitats, during the growth of a variety of biological species, not only the number of species more And there are many species unique to China. China's wetlands, a wide variety of birds, 57 species of endangered birds in Asia, China will have 31 species within the wetland; geese and ducks in China, there are 50 species of wetland; world's 15 species of cranes China have only recorded 9; In addition, many are cross-border migratory birds. wetlands in China, some are only some of the world of birds wintering or migration must be passed through.

two characteristics of the wetland birds

variety of wetland birds, which depends on the Earth's fresh water, salt water or brackish water and other types of wetlands and breeding habitat. for wetland ecosystems for wetland birds is an important part, and wetland ecosystems, energy flow and to maintain the stability of ecosystems play an important role,UGG boots, while also monitoring water quality of wetlands is extremely sensitive biological indicators.

many of our wetlands is an important migratory northern and southern hemispheres, 125 species, 54 genera and 14 families wading birds 132 species, included in the rapid population growth,UGGs, industrial and agricultural production, the human impact on wetlands growing, so do wetland bird surveys, analysis of human and environmental change on bird species, the number of changes and adopt policies to protect wetland resources, maintain the basic ecology of wetlands, to improve the ecological environment and guarantee sustainable development of economic and social significance.

precisely because in China, from cold temperate to tropical, from the coast to the inland plateau from the plains to the mountains Wetlands are distributed between large, complex, sinister, to investigate the accuracy of the bird made it difficult, and this bird song recording system will be to survey the wetland bird survey techniques to provide a new .

3 E3 wild birds in the region (animal) survey system introduced

(1) E3 system mainly includes: • two away from the microphone picked up (180 degree configuration, stereo) • Marantz PMD 660 professional, digital field recorder • audio sound device has been calibrated, and provide the basis for the recording tone (standard reference tone) • a headset • tripod • all connections, connectors and other
(2) E3 system is far better to use a pick up from the microphone

E3 used far the world's most unique pick up from the pickup, it is radiation to the pickup, the pickup is to send the best sound quality (system ), its range and scope of the pickup greatly over directional microphones, parabolic microphones and microphone interface. conventional microphone is always unable to meet the requirements in many outdoor recording, in particular distance range and sensitivity.

• pick up sound farther pickup wider range, up to 250 m (depending on the environment,cheap UGG boots, weather conditions and surrounding noise situation)

• 360 degree radial pickup direction

• has a very good pick up large-scale and multi-source remote function

the limitations of conventional microphone

in the human voice, musical instruments, animal sounds or any other audio signal recording, sound recording staff is always trying to make a clear recording of the voice, clear and natural balance. To achieve these aims must carefully consider the following factors:

• Microphone selection (that is, considering the directional microphone performance,Discount UGG boots, heart-shaped line, or pickup range)

• microphone sound

• what position the microphone on the received signal Best

tried various ways to compensate for the microphone directional, cardioid pickup line and scope of the inherent defect, when the microphones pick up sound quality changes, but also carefully re-arrangement of the microphone, location (or use multiple microphones).

far picked up from microphone directional microphone to solve the traditional performance, heart-shaped pickup lines and the problem of insufficient scope to meet a wide range of monitoring and recording applications require. far away from the microphone picked up a simple, easy to install and use, without regard to the location of the microphone can be achieved by placing completely true, excellent pickup results. Because of its unique sound pressure gain compression technology, the sound without distortion.

(c) E3 system technical characteristics

• Whether the sound source pick up location at the far distance away from the microphone pickup to any position, regardless of the distance between sound source and microphone how far (in the microphone pickup distance), the microphone can pick up and maintain the original sound quality.

• pickup distance of 250 meters

• pick up the sound direction: the direction of radiation to capture 360-degree sound

• Even when the sound source and microphone are great distances or is a great echo in the environment, it is picked up clearly, natural sound.

• high sensitivity to noise ratio increased to 14 db (patented technology)

& bull ; off-axis frequency response of the minimum

• that performance with directional pickup pickup also has full sexual performance.

• stereo pickup (two pickups, each pickup configuration point at 180 degrees, high touch the ear pick up sound imitation of two ways).

• free to carry, plug and play, directly into MP3 players, digital video recorder (VDR), tape recorders (VCR), etc., very convenient.

• It is not afraid of including wind rain, both high and low temperature in harsh or volatile environment, all-weather outdoor work in the system