Researchers say they can lessen cabin noise by more than 100 times

FINALLY there could be an answer to silencing that annoying humming noise on flights.
Forget ear plugs and noise cancelling headphones, researchers say

 they ШУУД ҮЗЭХ have come up


with a material that would lessen the noise in cabins by over 100 times.
Yun Jing and his team at North Carolina State University collaborated with MIT to create a “thin, lightweight membrane” to cover the noise producing honeycomb structures found in plane fuselages.
These honeycomb structures make up the floor and ceiling of most plane cabins due to their light weight and strength however they’re inefficient at blocking out low-frequency noise.
Jing and his team of researchers
have created a membrane to cover one side of these honeycombs structures so that when the soundwaves hit it they bounce off rather than passing through.

The thin membrane would sit on one side of the honeycomb structures to deflect noise. Picture: Yun Jing/NC State University Source: Supplied

“It’s particularly effective against low-frequency noise,” Jing says. “At low frequencies — sounds below 500 Hertz — the honeycomb panel with the membrane blocks 100 to 1,000 times more sound energy than the panel without a membrane.”
The membrane is made of rubber that is about 0.25 millimetres thick, and adds approximately 6 per cent to the overall weight of the honeycomb panel.
“The membrane is relatively inexpensive to produce, and can be made of any material that does not impact the structural integrity of the honeycomb panel,” says Ni Sui, a Ph.D. student in Jing’s lab and lead author of the paper. “It could make flying much more pleasant for passengers — particularly in helicopters.”