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

05 Mar

First-ever comprehensive survey of India’s river dolphins

'Prime Minister Narendra Modi released the results of the first-ever comprehensive population estimation of riverine dolphins – Gangetic and Indus dolphins – done in In

Read More

05 Mar

Arresting women at night

'The Madurai Bench of the Madras High Court in Deepa versus S. Vijayalakshmi and Others ruled that the legal provision in the Bharatiya Nagarik Suraksha Sanhita (BNSS), 2023, which

Read More

05 Mar

Digital Personal Data Protection Act, 2023

'The Ministry of Electronics and Information Technology (MeitY) looking to wrap up public consultations on the draft Rules for the Digital Personal Data Protection Act, 2023 by Mar

Read More

India’s First Ai-Driven Magazine Generator

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