Noise Pollution in Madras, A 1926 Study and Its Lessons for Today
Madras, Feb. 25: A pilot study on “noise pollution”, conducted in four selected areas in Madras during peak hours, shows that the intensity of sound level is “highly irritating and uncomfortable” opposite the Anna Salai Post Office. However, the intensity of sound (73 decibels) registered in the areas falls well within the damaging noise level (85 decibels) and is lower than what is obtaining in other major cities like Bombay, Calcutta and Delhi.
This report, now a century old, offers a fascinating snapshot of urban life in 1926 and raises questions that remain relevant today. How do we measure pollution? What thresholds are acceptable? And how do cities balance development with public health?
The Study’s Findings
Frequent horning and engine vibrations, especially of motorcycles and scooters, are the loud irritants outside the Anna Salai Post Office. The area near the Central Station and the General Hospital comes second with 71 decibels, the Kothwal Market area third with 70 decibels and the Parry’s Corner fourth with 69 decibels.
The study is part of a noise pollution survey in different parts of Madras, Madurai, Coimbatore, Trivandrum, Cochin, Mysore and Bangalore, sponsored by the Department of Science and Technology of the Union Government. A team of ENT specialists and audiologists of the Institute of Oto-Rhino Laryngology at the Madras Medical College and engineers of the IIT, which conducted the study with the help of sophisticated sound level meters and analysers and by interviewing the people, has expressed the view that unless the increasing noise pollution was checked, the continuous exposure of the residents in the area for a prolonged period may end in permanent irreversible hearing loss.
This warning, issued in 1926, is even more urgent today.
The 85-Decibel Threshold
The study notes that 73 decibels falls “well within” the damaging noise level of 85 decibels. This threshold—85 decibels—remains a standard reference point for occupational noise exposure. Prolonged exposure above this level can indeed cause hearing damage.
But the study’s framing is instructive. It does not celebrate that Madras is quieter than Bombay, Calcutta, and Delhi. It warns that even 73 decibels is “highly irritating and uncomfortable” and that continued exposure could lead to permanent hearing loss. The warning is about cumulative effects, not just immediate harm.
The Sources of Noise
The study identifies “frequent horning and engine vibrations, especially of motorcycles and scooters” as the primary irritants. A century later, the sources have multiplied—air conditioners, generators, loudspeakers, construction equipment, aircraft—but the fundamental problem remains: urban life generates noise, and that noise has health consequences.
The specificity of the study—identifying particular locations and particular sources—reflects a public health approach that we could use more of today. Instead of generalised complaints about “noise pollution,” we need systematic data collection, source identification, and targeted interventions.
The Malaria Parallel
A second report from the same period addresses a different public health challenge: malaria in Bombay. A sub-committee appointed by the Corporation have recommended drastic measures for combating malaria. They suggest the doing away with open roadside drains which should be replaced by underground stormwater pipes, the covering up of the stormwater pipes and tanks of mills rendering wells mosquito proof and filling in the low-lying lands in the city.
The railway companies ought to be called upon to fill in the low-lying lands on either side of the railway lines within the railway limit and neither the Government nor anyone else be exempted from statutory obligation and liabilities, enforceable under the Municipal Law in matters affecting the health of the city.
This is a remarkable document. It recognises that malaria is not just a medical problem but an environmental one. It identifies specific sources—open drains, uncovered tanks, low-lying lands—and proposes specific solutions. It insists that all parties, including railway companies and the government, must be subject to the same rules.
Public Health Then and Now
Both reports reflect a public health approach that was sophisticated for its time. They involve data collection, source identification, specific recommendations, and calls for enforcement. They recognise that health is not just about treating individuals but about shaping environments.
Today, we have more data, better technology, and greater resources. But we sometimes lose sight of the fundamentals: identify the problem, find the source, fix it. The 1926 reports remind us that public health is, at its core, a matter of good governance.
The Lessons for Today
First, systematic data collection matters. The noise pollution study measured decibels at specific locations, identified sources, and compared across cities. This is the kind of evidence that can inform policy.
Second, thresholds are not absolutes. The study notes that 73 decibels is below the 85-decibel damage threshold but still “highly irritating and uncomfortable.” We should not wait for harm to reach catastrophic levels before acting.
Third, sources matter. Identifying that motorcycles and scooters are the primary irritants allows for targeted interventions—better silencers, traffic management, public awareness.
Fourth, all parties must be accountable. The malaria report insists that “neither the Government nor anyone else be exempted.” Public health requires consistent enforcement.
Conclusion: The Past as Prologue
The 1926 reports from Madras and Bombay remind us that public health challenges are not new. Noise pollution and malaria were problems a century ago, and they remain problems today. But they also remind us that good data, specific recommendations, and accountable governance can make a difference.
The warning about noise pollution—that prolonged exposure could lead to permanent hearing loss—was prescient. Today, we know that noise pollution contributes not just to hearing loss but to stress, sleep disturbance, cardiovascular disease, and cognitive impairment.
The recommendations about malaria—drainage, covering tanks, filling low-lying lands—were effective. Malaria was largely eliminated from Bombay and other cities through exactly these kinds of environmental interventions.
The past has lessons for the present. We would do well to learn them.
Q&A: Unpacking the 1926 Public Health Reports
Q1: What did the 1926 Madras noise pollution study find?
The study found noise levels of 73 decibels opposite Anna Salai Post Office (highest), 71 near Central Station/General Hospital, 70 at Kothwal Market, and 69 at Parry’s Corner. These were below the 85-decibel damage threshold but described as “highly irritating and uncomfortable.” Frequent horning and engine vibrations from motorcycles and scooters were identified as primary irritants.
Q2: What warning did the study issue?
The ENT specialists and audiologists warned that unless increasing noise pollution was checked, continuous exposure of residents for prolonged periods could result in permanent irreversible hearing loss. This recognised that cumulative effects matter, not just immediate harm above thresholds.
Q3: What were the malaria control recommendations for Bombay?
Recommendations included: replacing open roadside drains with underground stormwater pipes; covering stormwater pipes and mill tanks; rendering wells mosquito-proof; filling low-lying lands in the city; and requiring railway companies to fill low-lying lands along railway lines. Crucially, it insisted that no one—government or otherwise—be exempt from statutory obligations affecting public health.
Q4: What public health approach do both reports reflect?
Both reports reflect a sophisticated approach involving: systematic data collection (measuring decibels, identifying malaria sources); source identification (specific locations, specific contributors); specific recommendations for intervention; and insistence on accountable enforcement covering all parties. They treat health as an environmental and governance issue, not just a medical one.
Q5: What lessons do these 1926 reports offer for today?
Four key lessons: systematic data collection matters for evidence-based policy; thresholds are not absolutes—we should act before harm reaches catastrophic levels; identifying specific sources enables targeted interventions; and consistent enforcement across all parties is essential for public health. The past reminds us that good governance is fundamental to health outcomes.
