Navigation Links
Simple rubber device mimics complex bird songs
Date:11/21/2010

WASHINGTON, D.C., November 21, 2010 -- For centuries, hunters have imitated their avian prey by whistling through their fingers or by carving wooden bird calls. Now a team of physicists at Harvard University in Cambridge, Massachusetts, has reproduced many of the characteristics of real bird song with a simple physical model made of a rubber tube.

"We wanted to know if you [could] build a simple device, which has minimal control but reproduces some non-trivial aspects of bird song," says L Mahadevan, a professor at Harvard. The work is being presented today at the American Physical Society Division of Fluid Dynamics meeting in Long Beach, CA.

Bird song -- a complex sound full of intricate patterns and rich harmonics -- has long been studied by neuroscientists. Their research has explained much about how young birds learn these songs from adults and the complex neurological changes that allow them to control their voices.

But Aryesh Mukherjee, a graduate student in Mahadevan's laboratory, suggests that this neural control need not be as complicated as it could be. He suspects that the physics of a bird's vocal tract could explain much of the complexity of its voice, even with relatively simple neural control.

His bird call device consists of an air source, which creates a flow through a stretched rubber tube (modeled after a bird's vocal tract), and a linear motor that presses on the tube in a fashion analogous to a contracting muscle.

"Using this very simple device that pokes a tube, I see these beautiful sounds being produced without a sophisticated controller," says Mukherjee.

When analyzed on a spectrogram, the harmonics and other characteristics of the sounds made by the physical model closely resemble the songs of a zebra finch.

Another researcher in the lab, Shreyas Mandre, now an assistant professor at Brown University, is building mathematical models that seek to capture some of the underlying principles. His model, which represents the voice as a stretched string with dampened vibrations, creates digital bird calls that are also very similar to the real thing.

"Once we understand the physics better, we'll be able to mimic the sound much better," says Mandre.

The principles underlying the models aren't limited to single species of birds. The researchers believe that -- with a few tweaks -- their models could mimic a variety of bird calls.


'/>"/>

Contact: Jason Socrates Bardi
jbardi@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Related biology news :

1. Radically simple technique developed to grow conducting polymer thin films
2. Sniffing out shoe bombs: A new and simple sensor for explosive chemicals
3. Simple approach could clean up oil remaining from Exxon Valdez spill
4. Caltech chemists develop simple technique to visualize atomic-scale structures
5. Health diagnosis made simpler
6. The secret of life may be as simple as what happens between the sheets -- mica sheets
7. Research develops simple recipe for fungus-free horseradish
8. Study finds that simple 2-question survey can better identify hungry children
9. Cheap, simple, noninvasive blood test may replace invasive diagnostic techniques in early pregnancy
10. New study documents use of hormone progesterone in simple microscopic aquatic animals
11. Pitt researcher says simple polymer-based filter successfully cleans water, recovers oil in Gulf of Mexico tests
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/19/2017)... New York , April 19, 2017 ... competitive, as its vendor landscape is marked by the ... the market is however held by five major players ... Safran. Together these companies accounted for nearly 61% of ... of the leading companies in the global military biometrics ...
(Date:4/13/2017)... India , April 13, 2017 According to ... Proofing, Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, ... MarketsandMarkets™, the IAM Market is expected to grow from USD 14.30 Billion ... Growth Rate (CAGR) of 17.3%. ... MarketsandMarkets ...
(Date:4/11/2017)... , April 11, 2017 NXT-ID, Inc. ... technology company, announces the appointment of independent Directors Mr. ... to its Board of Directors, furthering the company,s corporate governance ... Gino ... we look forward to their guidance and benefiting from their ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... International research firm Parks Associates announced today that Tom ... 2017 Annual Meeting , October 11 in Scottsdale, Arizona ... and how smart safety and security products impact the competitive landscape. ... Parks Associates: Smart Home Devices: Main Purchase Driver ... "The residential security market has experienced continued growth, and ...
(Date:10/10/2017)... ... October 10, 2017 , ... USDM Life ... for the life sciences and healthcare industries, announces a presentation by Subbu Viswanathan ... The presentation, “Automating GxP Validation for Agile Cloud Platforms,” will present a revolutionary ...
(Date:10/9/2017)... 2017  BioTech Holdings announced today identification and ... ProCell stem cell therapy prevents limb loss in ... demonstrated that treatment with ProCell resulted in more ... compared to standard bone marrow stem cell administration.  ... reduction of therapeutic effect.  ...
(Date:10/9/2017)... , ... October 09, 2017 , ... At its national ... Christopher Stubbs, a professor in Harvard University’s Departments of Physics and Astronomy, has been ... a member of the winning team for the 2015 Breakthrough Prize in Fundamental physics ...
Breaking Biology Technology: