Featured Research

from universities, journals, and other organizations

Zeroing in on the 'science of sound propagation' in burning buildings

Date:
October 23, 2012
Source:
Acoustical Society of America (ASA)
Summary:
An acoustic navigation system being developed by a team of researchers studying the science of sound propagation inside burning buildings may one day become a life-saving addition to firefighters’ arsenal of tools.

An acoustic navigation system being developed by a team of University of Texas at Austin researchers studying the science of sound propagation inside burning buildings may one day become a life-saving addition to firefighters' arsenal of tools.

The team will provide details about their multi-faceted research at the Acoustical Society of America's 164th Meeting, October 22-26, 2012, in Kansas City, Missouri.

"Our study is focusing on locating open doors inside burning buildings to gain a better understanding of how acoustic propagation is affected when flames are between the device and a doorway," explains Mustafa Abbasi, a graduate research assistant.

Inside buildings engulfed in flames and smoke, firefighters currently rely on tools such as thermal imaging cameras to help them not only detect obstacles and passageways, but also to judge distances to them. But unfortunately, heat and open flames can significantly degrade the performance of these cameras.

To address this, the team decided to create a complementary sonar-based imaging technique to supplement TIC technology.

They initially selected an ultrasonic device similar to the ones used in cars' reverse parking sensors to build their acoustic navigation device, but quickly discovered that fire strongly distorts ultrasonic acoustic waves.

The team then turned to a more advanced acoustic source, called a "parametric array," which is capable of creating audible sound that remains focused.

"Using a parametric array enables us to effectively see through moderate-sized flames," says Abbasi. "Now, we're investigating the effect of smoke on acoustic propagation. Flames and smoke are interrelated, but TIC images are degraded less by smoke. We believe that combining acoustic sensing with other technologies will improve the capabilities of these imaging devices."

Yet another facet of this project involves working to improve personal alert safety system (PASS) devices used to locate incapacitated firefighters. The team is collaborating with the National Fire Protection Association's Fire Protection Research Foundation and the Federal Emergency Management Agency (FEMA) to study how the signal emitted by the PASS device propagates inside burning buildings.


Story Source:

The above story is based on materials provided by Acoustical Society of America (ASA). Note: Materials may be edited for content and length.


Cite This Page:

Acoustical Society of America (ASA). "Zeroing in on the 'science of sound propagation' in burning buildings." ScienceDaily. ScienceDaily, 23 October 2012. <www.sciencedaily.com/releases/2012/10/121023123956.htm>.
Acoustical Society of America (ASA). (2012, October 23). Zeroing in on the 'science of sound propagation' in burning buildings. ScienceDaily. Retrieved October 2, 2014 from www.sciencedaily.com/releases/2012/10/121023123956.htm
Acoustical Society of America (ASA). "Zeroing in on the 'science of sound propagation' in burning buildings." ScienceDaily. www.sciencedaily.com/releases/2012/10/121023123956.htm (accessed October 2, 2014).

Share This



More Matter & Energy News

Thursday, October 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Japan Looks To Faster Future As Bullet Train Turns 50

Japan Looks To Faster Future As Bullet Train Turns 50

Newsy (Oct. 1, 2014) Japan's bullet train turns 50 Wednesday. Here's a look at how it's changed over half a century — and the changes it's inspired globally. Video provided by Newsy
Powered by NewsLook.com
US Police Put Body Cameras to the Test

US Police Put Body Cameras to the Test

AFP (Oct. 1, 2014) Police body cameras are gradually being rolled out across the US, with interest surging after the fatal police shooting in August of an unarmed black teenager. Duration: 02:18 Video provided by AFP
Powered by NewsLook.com
Raw: Japan Celebrates 'bullet Train' Anniversary

Raw: Japan Celebrates 'bullet Train' Anniversary

AP (Oct. 1, 2014) A ceremony marking 50 years since Japan launched its Shinkansen bullet train was held on Wednesday in Tokyo. The latest model can travel from Tokyo to Osaka, a distance of 319 miles, in two hours and 25 minutes. (Oct. 1) Video provided by AP
Powered by NewsLook.com
Robotic Hair Restoration

Robotic Hair Restoration

Ivanhoe (Oct. 1, 2014) A new robotic procedure is changing the way we transplant hair. The ARTAS robot leaves no linear scarring and provides more natural results. Video provided by Ivanhoe
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