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By:

Rajendra Joshi

3 December 2024 at 3:50:26 am

Proud moment for Shivaji University researchers

Indian patent for portable sound absorption testing device Kolhapur: Researchers from Shivaji University, Kolhapur, have developed a portable sound absorption testing device that can scientifically assess whether an installed sound system and its acoustic treatment are functioning effectively. The innovation has been granted an Indian patent, marking a first-of-its-kind development in this field, the university said on Thursday. The patented device, named the Portable Sound Absorption Tester,...

Proud moment for Shivaji University researchers

Indian patent for portable sound absorption testing device Kolhapur: Researchers from Shivaji University, Kolhapur, have developed a portable sound absorption testing device that can scientifically assess whether an installed sound system and its acoustic treatment are functioning effectively. The innovation has been granted an Indian patent, marking a first-of-its-kind development in this field, the university said on Thursday. The patented device, named the Portable Sound Absorption Tester, has been developed by senior chemist Dr Kalyanrao Garadkar of Shivaji University, along with Dr Sandeep Sable and Dr Rohant Dhabbe of Jaysingpur College, and Dr Chandrala Jatkar of the D K T E Society’s Textile and Engineering Institute, Ichalkaranji. The device is designed to test the sound absorption capacity of professional acoustic systems used in recording studios, theatres, auditoriums and soundproof chambers. Until now, the effectiveness of such sound-absorbing installations has largely been assessed through experience and trial-and-error after installation. The newly developed portable tester allows for immediate and scientific evaluation of sound absorption performance once the system is installed. Sound-absorbing sheets and panels are widely used in theatres, studios and vocal recording rooms to absorb echo around microphones and create a controlled acoustic environment, enabling cleaner and more professional audio output. The new device can be used to evaluate a wide range of absorbers, including perforated foam, fibre, fabric, membranes, panels and resonant absorbers, helping improve the quality and effectiveness of acoustic materials. Explaining the working of the device, Dr Garadkar said that the human audible frequency range extends from 20 Hz to 20 kHz. The device generates sound waves within this spectrum and projects them onto the acoustic material under test. The sound waves that are not absorbed are detected by a microphone and displayed on the screen in the form of current or voltage readings. This enables users to instantly determine whether the sound absorption system is functioning as intended and make corrective interventions if required. The researchers said the device would also be useful for those engaged in acoustic fabrication and sound absorption research. Apart from being portable and easy to transport, the device is also cost-effective, making it suitable for field applications. The team expressed confidence that it would prove highly useful in the sound system testing sector. Shivaji University’s in-charge Vice-Chancellor Dr Suresh Gosavi and in-charge Pro Vice-Chancellor Dr Jyoti Jadhav congratulated the research team on securing the patent.

US Vice President JD Vance, his family arrive in Delhi

  • PTI
  • Apr 21, 2025
  • 2 min read


NEW DELHI: US Vice President J D Vance arrived here on Monday on a four-day visit to India against the backdrop of ongoing negotiations for a bilateral trade agreement between the two strategic partners to address a variety of issues, including tariff and market access.


Vance is accompanied by his Indian-origin wife Usha Chilukuri and their three children Ewan, Vivek, Mirabel and a delegation of senior US government officials.


The US Vice President and the Second Lady were received at the Palam air base by Union Minister Ashwini Vaishnaw.


The American leader was also accorded a ceremonial welcome on his arrival.

In the evening, Prime Minister Narendra Modi will host a dinner for the Vances after holding wide-ranging talks with the US Vice President.


External Affairs Minister S Jaishankar, NSA Ajit Doval, Foreign Secretary Vikram Misri and Indian ambassador to US Vinay Mohan Kwatra are expected to be part of the Indian team to be led by PM Modi at the talks.


The focus of the meeting is likely to be on early finalisation of the proposed bilateral trade pact as well as ways to boost overall trajectory of ties between the two countries.


Besides Delhi, Vance and his family will travel to Jaipur and Agra.

Vance's first visit to India comes weeks after US President Donald Trump imposed and then paused a sweeping tariff regime against around 60 countries, including India.


New Delhi and Washington are now holding negotiations to seal a bilateral trade agreement that is expected to address a variety of issues, including tariff and market access.


Vance and his family are scheduled to leave for Jaipur on Monday night.

In Delhi, the US Vice President and his family are staying at the ITC Maurya Sheraton hotel.


On April 22, the Vances will visit a number of historical sites in Jaipur, including the Amer Fort, also known as Amber Fort. The fort is a UNESCO world heritage site.


In the afternoon, the US Vice President is scheduled to address a gathering at the Rajasthan International Centre in Jaipur.


Vance is expected to delved into broader aspects of India-US relations under the Donald Trump administration during his speech that is expected to be attended by diplomats, foreign policy experts, Indian government officials and academia.


The US Vice President and his family will travel to Agra on the morning of April 23, people familiar with the matter said.


In Agra, they will visit the Taj Mahal and Shilpgram which is an open air emporium showcasing various Indian artefacts, they said.


After concluding their visit to Agra, the Vances will return to Jaipur on the second half of April 23.


The US Vice President and his family will depart for the US from Jaipur on April 24, according to the people cited above.

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