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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.

Bharat’s Jetson Cities, Light-years Away from Nature

Updated: Jan 20, 2025

Jetson Cities

One thing is for certain: our Bharatiya cities, the big metros and towns, are fast becoming like the ‘Jetson’ cities. For those who are unaware of Jetson cities, these were first shown in the famous Hanna-Barbera cartoon series, the Jetsons, set in the 2100s, where cities are air-tight glass globules tethered to the ground, and the only way to get in and out are the flying cars. Yes, we, the city-dwellers, aspire to tall skyscrapers, spectacular bridges, world-class tunnels, swooshing metro trains, and we are building Jetson-like flying cars. A few HD drone images here and there, during the day and at night and around twilight, and we are content that our cities have become the cynosure of our own eyes. We want our cities to be brightly lit, with neon signs, laser shows, and large billboard videos. We would then fulfil our inner desire to have a city on par with Tokyo, New York, and Shanghai.


Our buildings, designed for the next 30 years, are well air-conditioned, shielding occupants from a soupy dust bowl of brown smog, soot, particulate matter, and fine dust. It is said that most new home buyers invest at least 10% of their property’s price in enhancing the interiors, soundproofing their homes, using air purifiers and conditioners, and disconnecting from the outside world for that much-needed solace. Indeed, large builders promote their projects as close to nature amidst tranquillity. However, there is always another builder eager to get one plot of land ahead of yours to enjoy that nature. To be truthful, access to nature now comes at a premium - even the skies.


Let’s assume the working-age population is occupied in the leisure of our Jetson cities, but how many of their young school and college-going kids have seen the long arm of the Milky Way galaxy from their cities? How many have witnessed a comet zooming by? How many know about endemic plants with medicinal properties? When did they last see a chirping house sparrow? How many know that the nearest sewage drain was once a freshwater stream? When did they last find their suburban beach prettier than the resort beaches of Maldives?


The intent to ask these questions is simple: Bharat is currently at a crossroads. Pundits are enthusiastic about a cultural renaissance on the horizon. Corporate leaders, on the other hand, want us to invest hundreds of hours each week to pay our dues to the growth of the national GDP. But no one asks, if a cultural renaissance is to occur, who will generate the new understandings and insights of nature that arise typically during such a period of human advancement? No one is actually asking, for whom are we building the nation if there is no time for children, or worse, if there is no time or intent to have children. In the process of growing rich, we are about to become old. By 2047, 65% of the population under the age of 35 will grow beyond 35 all at once, and we’d have an enormous population in advanced ages with a tapering young population, a graph that looks like a banyan tree. Unfortunately, that young population will have no access to the knowledge that nature has to offer, neither flora and fauna nor the seas and the skies.


Our urbane lifestyles need tempering. Such tempering can occur only if we ensure the revival of natural sciences during this period of cultural renaissance and nation-building. Let’s not rely solely on the educational system. With Indian Knowledge Systems, constructive changes are underway, and academic curricula are poised to improve for the greater good. However, true knowledge arises only when parents and grandparents introduce children to nature. Genuine understanding also develops from extracurricular activities in schools and colleges that encourage kids to observe, journal, and act on their discoveries. On the positive side, our country’s forest cover is increasing, as announced by the government. However, efforts must be made to ensure that every school or college, whether in Mumbai, Vijayawada, Gorakhpur, Ratlam, Thrissur, Bhuj, Faridabad, Imphal, Manali, Cuttack, or Ajmer, guarantees that their students are well aware of the endemic nature of their surroundings and are regularly observing and recording data on whatever interests them. Let kids observe rivers and understand the volume of water that flows through them. Let children learn about the decline of house sparrows in their cities and what steps should be taken to revive their populations. Let them study the bees in their nearby groves and recognise the vital role these bees play in nature.


Of course, you need to learn AI, robotics, fintech, the next generation of management courses, and all the engineering bells and whistles. However, we must not leave the next generation with inadequate comprehension and skills for understanding nature. We must ensure that nature conservation is not merely lip service or a tool for politicised green activists. This can be achieved if natural sciences are given the respect they deserve at the school, undergraduate, and postgraduate levels.


Indeed, I am a plebeian, and you might feel that you, too, could write a rant about the plight of our urban lives. Urban development and municipal experts have many solutions to propose, but few are willing to take action. However, that is not the issue I wish to highlight. I aim to illustrate a much larger concern—that Indian city dwellers are disoriented and devoid of nature, lacking a guiding star to lead them toward a brighter future. Our cities of Mumbai, Delhi, Bengaluru, Ahmedabad, Kolkata, and Chennai have taken on characteristics reminiscent of Jetson-like cities. We show little regard for the Nagar Devata, Gram Devata, and Van Devata, who have protected the cities, towns, and forests that once surrounded us. We wait for formal governance to clean up our beaches, rivers, and ponds without making sufficient efforts to prevent pollution in the first place.


For those striving to grasp spirituality not through the Puranas and Aadi-Granth but through new-age podcasts, I recommend watching Vinay Varanasi’s podcast on Bhagavan Vishnu’s Dashavatar. If it is clear that Bhagavan Vishnu does not tolerate disregard for Bhudevi or Mother Earth, why do we, the devotees of Bhagavan Vishnu, continue to pollute our Mother Earth—her air, soil, waters, and sounds? Or have we taken Elon Musk's words at face value, assuming our next destination is Mars after destroying Earth, only to ruin Mars later, even worse than its current clinically sterile state? If that is the case, then bear with me when I say this: these Jetson cities stand on precarious pillars of ego, victimhood, apathy, and consumerism, waiting to be toppled either by the true harbingers of order or by false prophets. Therefore, teach the next generations to observe nature, appreciate our coexistence with other species, and venerate the forces of nature. By doing so, we humans will be good, at least for the next thousand years. If not, prepare for a bleak future by the end of this century.


(The author is a Space and Emerging Technology Fellow at the Centre for Security, Strategy and Technology, Observer Research Foundation, Mumbai. Views personal.)

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