The New Stuff

soundproof windows

Double glazed window by Korean scientists blocks sound, allows free flow of air


soundproof windows

One of the persisting problems of modern life is the noise pollution. The unwanted sounds like that of  machinery, engines, etc., when released into the environment causes adverse effects on mental and psychological well being. Although, insulating the windows against sound is a solution to this issue, but this procedure is difficult and also very expensive. However, there is another solution to it – soundproofing, which  transfers sound from the air into some other medium that absorbs and attenuates it. But, it also involves blockage of air. A team of two South Korean material scientists has come up with a way out of separating sound from the air and then attenuate it. They have created a double glazed window that stops sound but lets the air pass.

Sang-Hoon Kima at the Mokpo National Maritime University in South Korea and Seong-Hyun Lee at the Korea Institute of Machinery and Materials designed a sound resonance chamber by making use of material with a negative bulk modulus as only such a material can attenuate sound that passes through it. Since there is no solid material with a negative bulk modulus so they made the chamber with two parallel plates of transparent acrylic plastic about 150 millimeters square with a gap of 40 millimeters between them. Therefore any sound that resonates inside this chamber acts in an opposite way the same sound would have compressed the chamber and thus resulting out into a negative bulk modulus.

In order to maximize the efficiency of sound getting into the chamber, the scientists drilled a 50mm hole on each acrylic plate. This way any range of sound could be diffracted strongly inside the chamber, while allowing a free flow of air providing excessive ventilation.

This double glazed window was used as a building block to create bigger windows, which could reduce sound levels by 20-35 decibels over a sound range of 700 Hz to 2,200 Hz. What’s more, these double glazed windows are also tunable just by altering the size of the penetrations to stop the sounds of certain frequencies. This redesigned window is definitely a wise solution to the issue of everyday increasing noise pollution.

Via: TechnologyReview

 

Recommended for You

The following two tabs change content below.
A soft hearted girl, Garima finds herself to be lucky to be born in Shimla, Himachal Pradesh. With a writing experience of three years, she has been writing for various renowned blogs and absolutely enjoys her work. She is a firm believer of God and holds a positive attitude towards life. She is a big chatter box and adores every kind of music.

Recently Published

Phaedra Table Lamp
»

Phaedra Table Lamp with dramatically blow molded glass shades

Underestimated Risks of Ethanol Fireplaces
»

Are you aware about unforeseen risks of ethanol fireplaces?

Leo Bonten Turned His Amputated Leg into Lamp
»

Dutchman preserved and turned his amputated leg into a lamp

Stick Stove
»

Stick Stove: Portable fuel burning device for developing countries

Smart Lamp Speaker by Emoi
»

Responsive Smart Lamp Speaker blends both sound and lighting

PikaPlant One Shelf Automatically Waters Plants
»

PikaPlant One shelf can automatically water your plants for a whole month

PRAUD Zinc-clad Leaning House
»

Praud’s Leaning House slants upwards for picturseque views and sunlight

Alter Ego Sofa by Eric Gizard
»

Alter Ego Sofa with chaise offers immense utility for urban lifestyle

Swirl Lamp by Solovyov Design
»

Swirl Lamp by Solovyov Design reminds us of whirling motion

Evander Broekman's Collection of Luxury Safes
»

Evander Broekman reveals high security certified collection of luxury safes

Table Sereno by Studio Fredrikson Stallard
»

Driade Sereno Coffee Table in an enduring sculptural design

Cuckoo Clock by Haoshi Design
»

Haoshi Designs’ Cuckoo Clocks come with pair of birds that meet on the hour

Two Makers' Randonneur Chair
»

Bicycle-themed rocking Randonneur Chair by Two Makers

Handwoven Sputnik Lamps by Julie Lansom
»

Handwoven crafty and contemporary Sputnik Lamps by Julie Lansom

Woven Treehouse by Tom Hare
»

Glowing woven treehouse seems like a giant nest in middle of the branches

Share with your friends










Submit