Sign In
Learn bits
Science & Tech.
Pradeep Kumar

11/09/21 11:35 AM IST

Noise Control Sheet Absorber

In news

An Indian researcher has fabricated paper honeycomb and stronger polymer honeycomb structure as sound-absorbing panels that dissipate acoustic energy to low-frequency ranges.

Details
  • The technology can be used in building acoustics and also as environmental noise control solution.
  • Many traditional materials have been found to be good at controlling higher frequencies.
  • However, natural bee hives have been found to efficiently control high as well as low frequencies because of their geometry.
  • It has been found from theoretical analysis and experimental investigations that this behaviour was owing to the conversion of acoustical energy into vibration energy. 
  • This vibration energy is dissipated in the form of heat due to wall damping property.
  • Mimicking this property as an engineering solution could offer a cost-effective method for controlling noise pollution.
  • The design methodology involves understanding the physics of bee hive sample acoustic energy dissipation and then mimicking its design. 
How the Panel was made?
  • The panels were made by slicing stacked extruded polypropene straws.
  • The slicing process is done with the help of hot wire, which also bonds the straws together.
  • The developed technology provides a mechanism of acoustic energy dissipation with lower thickness and higher specific strength of acoustic panels.
  • A test facility to measure the absorption coefficient of large samples has also been established as part of this work.
Source: PIB

More Related Current Affairs View All

19 Nov

Grievance Redressal Assessment And Index (GRAI) 2023 Launched

'Union Minister of State (Independent Charge) Science & Technology; Dr Jitendra Singh has launched Grievance Redressal Assessment and Index (GRAI) 2023.' Grievance Redress

Read More

19 Nov

Smog disrupts flights

'With the national capital enveloped in a blanket of noxious smog, flight operations at the Indira Gandhi International Airport in Delhi have been impacted.' At least 15 fligh

Read More

19 Nov

India’s road to net-zero

'Every year, climate action draws significant attention in the months leading up to the United Nations’ annual meeting of the Conference of the Parties (COPs).' An econo

Read More

India’s First Ai-Driven Magazine Generator

Generate Your Custom Current Affairs Magazine using our AI in just 3 steps