Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Dolphins Speak With Half-Nose

01.11.2004


Russian researchers have recorded the sounds audible only inside the right part of the dolphin’s nasal passage. Animals produce them during echolocation. This research can shed light on how the cetacea produce ultrasonic signals.



Researchers of the Severtsov Institute of Ecology and Evolution Problems, Russian Academy of Sciences, have obtained the confirmation of the hypothesis that the cetacea, dolphins in particular, produce sounds with the help of some pneumatic mechanism, i.e. by driving air under pressure in the depths of the organism. It is assumed that the animals’ right nasal passage is involved in the production of sounds.

The point is that dolphins turn out to be capable of producing special internal sounds but the sounds can be heard only during echolocation. These sounds are called “internal” as they are not heard on the outside (the researchers have managed to make out the sounds only with the help of special internal sensors). They can be heard only in a single location – in the right part of the dolphin’s nasal passage. According to the researchers, these sounds resemble whistle or meowing. The frequency and other properties of these sounds differ significantly from the so-called communicating whistle with the help of which dolphins communicate with each other.


Apparently, dolphins do not produce these sounds on purpose. There exist two versions of their origin: probably they accompany the process of overblowing the air in the organs responsible for production of ultrasonic signals. Or perhaps, internal sounds “result” from pressure difference in various parts of the nasal passage when the air goes through of them. This version is also confirmed by measuring air pressure in the dolphins’ respiratory system.

Sergey Komarov | EurekAlert!
Further information:
http://www.informnauka.ru

More articles from Life Sciences:

nachricht Warming ponds could accelerate climate change
21.02.2017 | University of Exeter

nachricht An alternative to opioids? Compound from marine snail is potent pain reliever
21.02.2017 | University of Utah

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Impacts of mass coral die-off on Indian Ocean reefs revealed

21.02.2017 | Earth Sciences

Novel breast tomosynthesis technique reduces screening recall rate

21.02.2017 | Medical Engineering

Use your Voice – and Smart Homes will “LISTEN”

21.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>