If you to think concerts of the rock they are high, you must hear the batons. An article published in the periodical PLoS ONE of the abr-access finds that the batons if emit the sounds that are above of the human initial point of pain.

The investigator Annemarie Surlykke (institute of biology, SDU, Denmark) and its colleague Elisabeth Kalko (university of Ulm, of Germany) had investigated the tests standards and the behavior of echolocation in 11 species of tropical batons insect-to eat of Panama. The batons use a system of the sonar to capture the robbery of the insect in the night, and the investigators reconstructed these passages of flight using disposals of the microphones and of photographic methods. These models had been used esteem the intensity of the sound that was emitted during the flights.

Surlykke and Kalko had found that the batons if emit a sound that was stronger of the one than all the other animal in air. The bonanza high sounds exceed a SPL of 140 decibels (DB) (measured level of healthy pressure in 10 cm of the mouth of the baton). That is higher of the one than DB 115 - 120 that concert high of the rock is emitted in one and in the human initial point of DB 120 of pain.

The human beings, however, cannot hear the call of echolocation since that the batons if emit sounds in ultrasonic frequencies. They make this the end to find the position of the small insects that would be lacked using lower frequencies. These high frequencies, even so, do not travel so distant in air how much low frequencies because of the ability of air to attenuate the sound. The investigators had used estimates of the scale of the detection for the typical robbery of the insect to conclir that extremely intense one, ultrasonic sounds are necessary the end to neutralize this attenuation.

Another one to find interesting was that the batons that if emit the highest frequencies were also these that if emit the highest intensities. This first study of comparative field of sounds of echolocation of the baton it found a wide variation of the intensities and the frequencies of the signal that had converged in similar scales of the detection.

“total, our study it mostly underlines the importance of measures of the intensity in the field as leveled games of the source a crucial and thus distant paper underestimated in echolocation of the baton. If we to want to understand more more than ecological and evolutionary project of the signal of echolocation of the form of the factors, an exactly bigger variety of parameters of the call we need to be considered, including the healthy duration and the interval of the pulse, that can create the overlapping of the cham-echo or other effect masking, “concla the authors.

The batons of Echolocating cry out for are noisily to detect its robbery
Surlykke, Kalko EKV
PLoS ONE (2008). 3(4): e2036.
doi:10.1371/journal.pone.0002036
Estale to see the article here

On PLoS ONE

PLoS ONE is the first periodical of the preliminary research of all the areas of science to use both revision pre- and of pair of the post-publication for it maximizes the impact of each report that it publishes. PLoS ONE is published by the public library of science (PLoS), to publisher of the Abr-access whose the objective is to make the world scientific and medical literature a public resource.

On the public library of science

The public library of science (PLoS) is an organization non-profit of the scientists and the committed doctors to make the world scientific and medical literature freely available a public resource. For more information, it visits http://www.plos.org

Writing close: Peter M Crust
Copyright: Medical notice Today
Not to be reproduced today without permission of the medical notice