Featured Research

from universities, journals, and other organizations

Jet Engines Help Solve The Mysteries Of The Voice

Date:
March 14, 2007
Source:
University of Cincinnati
Summary:
Although scientists know about basic voice production -- the two "vocal folds" in the larynx vibrate and pulsate airflow from the lungs -- the larynx is one of the body's least understood organs. Sound produced by vocal-fold vibration has been extensively researched, but the specifics of how airflow actually affects sound have not been shown using an animal model -- until now.

Sid Khosla, MD, researches how airflow affects sound in the larynx.
Credit: University of Cincinnati

Although scientists know about basic voice production—the two “vocal folds” in the larynx vibrate and pulsate airflow from the lungs—the larynx is one of the body’s least understood organs.

Sound produced by vocal-fold vibration has been extensively researched, but the specifics of how airflow actually affects sound have not been shown using an animal model—until now.

Vortices, or areas of rotational motion that look like smoke rings, produce sound in jet engines. New research from the University of Cincinnati (UC) uses methods developed from the study of jet noise to identify similar vortices in an animal model.

Sid Khosla, MD, lead author of the study, says vortices may help explain why individual voices are different and can have a different richness and quality to their sound.

“If vortices didn’t affect sound production, the voice would sound mechanical,” says Khosla, assistant professor of otolaryngology. “The vortices can produce sound by a number of mechanisms. This complexity produces a sound that makes my voice different from yours.”

Khosla and his team report their findings in the March edition of the Annals of Otology, Rhinology and Laryngology.

“Understanding how airflow patterns affect sound in a jet engine (aeroacoustics) helps us determine how we can reduce jet noise,” says coauthor Ephraim Gutmark, PhD, a UC professor of aerospace engineering. “We can apply the same physical understanding of aeroacoustics to study normal and abnormal voice.”

According to Khosla, computational and theoretical models have been developed to demonstrate how vortices affect sound production, but the UC team is the first to demonstrate it using an animal model, which makes their findings more applicable to the human larynx.

“Currently, when surgery is required to treat voice disorders, it’s primarily done on the vocal cords,” says Khosla. “Actually knowing there are additional sources that affect sound may open up a whole new way for us to treat voice disorders.”

In addition to better surgery techniques, Khosla says, having a better understanding of how vortices affect voice production could help in the development of improved pharmacological approaches and clinical pathology services, as well as improved training of the voice.

Khosla and Gutmark’s collaborators in the study are UC’s Shanmugam Muruguppan, PhD, and Ronald Scherer, PhD, now at Bowling Green State University.


Story Source:

The above story is based on materials provided by University of Cincinnati. Note: Materials may be edited for content and length.


Cite This Page:

University of Cincinnati. "Jet Engines Help Solve The Mysteries Of The Voice." ScienceDaily. ScienceDaily, 14 March 2007. <www.sciencedaily.com/releases/2007/03/070313144401.htm>.
University of Cincinnati. (2007, March 14). Jet Engines Help Solve The Mysteries Of The Voice. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2007/03/070313144401.htm
University of Cincinnati. "Jet Engines Help Solve The Mysteries Of The Voice." ScienceDaily. www.sciencedaily.com/releases/2007/03/070313144401.htm (accessed October 1, 2014).

Share This



More Matter & Energy News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Argentina's Tax Evaders Detected, Hunted Down by Drones

Argentina's Tax Evaders Detected, Hunted Down by Drones

AFP (Sep. 30, 2014) Argentina doesn't only have Lionel Messi the footballer, it has now also acquired "Mesi" the drone system which monitors undeclared mansions, swimming pools and soy fields to curb tax evasion in the country. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
Do Video Games Trump Brain Training For Cognitive Boosts?

Do Video Games Trump Brain Training For Cognitive Boosts?

Newsy (Sep. 29, 2014) More and more studies are showing positive benefits to playing video games, but the jury is still out on brain training programs. Video provided by Newsy
Powered by NewsLook.com
CERN Celebrates 60 Years of Science

CERN Celebrates 60 Years of Science

Reuters - Business Video Online (Sep. 29, 2014) CERN, the European Organisation for Nuclear Research, celebrates 60 years of bringing nations together through science. As Joanna Partridge reports from inside the famous science centre it's also planning to turn the Large Hadron Collider particle accelerator back on after an upgrade. Video provided by Reuters
Powered by NewsLook.com
This 'Invisibility Cloak' Is Simpler Than Most

This 'Invisibility Cloak' Is Simpler Than Most

Newsy (Sep. 28, 2014) Researchers from the University of Rochester have created a type of invisibility cloak with simple focal lenses. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins