Featured Research

from universities, journals, and other organizations

Researchers design a new structure that absorbs all sound

Date:
May 30, 2014
Source:
Asociación RUVID
Summary:
A new step toward the perfect acoustic absorber. Researchers have designed and experimentally evaluated in the laboratory a new structure made of conventional porous materials –- used in the construction industry -- that permit the complete absorption of sound at a wide range of frequencies.

V. J. Sánchez-Morcillo with materials.
Credit: Image courtesy of Asociación RUVID

A new step toward the perfect acoustic absorber. Researchers of the Universitat Politècnica de València at the Campus de Gandia have designed and experimentally evaluated in the laboratory a new structure made of conventional porous materials -- used in the construction industry -- that permit the complete absorption of sound at a wide range of frequencies.

Related Articles


The Technical University of Denmark, the LUNAM Université of Le Mans (France) and the Institute of Photonic Sciences (ICFO, in Spanish) have also taken part in this project. The results have been released in Scientific Reports, from Nature Publishing.

"Our study tackles one of the most important problems of society today from a new point of view: the design of materials and surfaces able to significantly reduce noise. In view of the results, we believe we have taken an important step toward the perfect absorber. And that has been done just by reconfiguring a known material," says Víctor Sánchez-Morcillo, researcher at the Campus de Gandia of the Universitat Politècnica de València and director of the Master's Degree in Acoustic Engineering, taught at this campus.

In their work, the researchers have demonstrated how the designed structure achieves extraordinary sound absorption using an apparently contradictory strategy: the sound attenuation increases when the quantity of absorbent material is reduced. This way, a totally reflective surface becomes a perfect absorbent despite the fact that, for the most part, there is no material that absorbs sound.

The key to understanding this reaction is the following: the new configuration of the material, in periodically distributed panels, allows sound waves to easily enter the material and increases the interaction between it -the wave- and the structure, thereby increasing the absorption.

As for its possible applications, Víctor Sánchez says that the study's conclusions open a new way to design new noise reduction solutions such as the development of new baffles to reduce noise pollution caused by roads, railways, etc.

All the experimental development of this work has been done at the Campus de Gandia of the Universitat Politècnica de València, a center with a wide research and teaching experience related to acoustics.


Story Source:

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


Journal Reference:

  1. J. Christensen, V. Romero-García, R. Picó, A. Cebrecos, F. J. García de Abajo, N. A. Mortensen, M. Willatzen, V. J. Sánchez-Morcillo. Extraordinary absorption of sound in porous lamella-crystals. Scientific Reports, 2014; 4 DOI: 10.1038/srep04674

Cite This Page:

Asociación RUVID. "Researchers design a new structure that absorbs all sound." ScienceDaily. ScienceDaily, 30 May 2014. <www.sciencedaily.com/releases/2014/05/140530092411.htm>.
Asociación RUVID. (2014, May 30). Researchers design a new structure that absorbs all sound. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2014/05/140530092411.htm
Asociación RUVID. "Researchers design a new structure that absorbs all sound." ScienceDaily. www.sciencedaily.com/releases/2014/05/140530092411.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) — Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
AP Review: Nikon D750 and GoPro Hero 4

AP Review: Nikon D750 and GoPro Hero 4

AP (Dec. 19, 2014) — What to buy an experienced photographer or video shooter? There is some strong gear on the market from Nikon and GoPro. The AP's Ron Harris takes a closer look. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) — The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
3D Printed Cookies Just in Time for Christmas

3D Printed Cookies Just in Time for Christmas

Reuters - Innovations Video Online (Dec. 18, 2014) — A tech company in Spain have combined technology with cuisine to develop the 'Foodini', a 3D printer designed to print the perfect cookie for Santa. Ben Gruber reports. Video provided by Reuters
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