There have been ongoing concerns about exposure to night-time noise among residents in Malta. However excessive noise is more than a nuisance; it is a health risk and an important determinant of health. As urbanisation, commercial activity and transport intensify, night-time noise is becoming a growing public health concern. It disrupts sleep, affects wellbeing and increases the risk of disease.

Understanding night noise pollution

Interestingly, the World Health Organisation identifies sleep disturbance as the largest contributor to the burden of disease from environmental noise. Night-time exposure is commonly assessed using Lnight, the average outdoor noise level over an eight-hour night-time period across a year. WHO recommends keeping average night-time noise below 45 dB for road traffic and 40 dB for aircraft noise to prevent adverse health outcomes.

In Malta, the Environment and Resources Authority's most recent Noise Action Plan identifies road traffic as the main source of night-time environmental noise. According to the European Environment Agency's Malta Noise Fact Sheet 2022, approximately 37,000 people across Malta were exposed to night-time road traffic noise and 400 to aircraft noise at or above 50 dB Lnight, both exceeding WHO targets. Leisure and entertainment noise create distinct challenges because exposure is often discontinuous, concentrated on weekends and marked by high-intensity peaks. Yearly averages can therefore mask the burden on residents, particularly when sudden events repeatedly interrupt sleep.

The public health and environmental impact of night noise pollution

Night-time noise is often dismissed as a nuisance, yet it can activate the body's stress response even without fully waking a person, increasing heart rate and blood pressure.

Consequently, repeated sleep disruption is associated with a higher risk of non-communicable diseases. Across Europe, transportation noise is estimated to contribute to 49,000 new cases of cardiovascular disease and 23,000 new cases of type 2 diabetes annually.

Continued exposure also takes a toll on mental health and is linked to depression, anxiety and reduced wellbeing. Residents affected by nightlife noise may experience irritability, nervousness, stress and despair, further worsening adverse outcomes.

Chronic night-time noise exposure can affect health across the life course. Emerging evidence links chronic noise exposure with increased dementia risk in adults, while children may experience poorer reading comprehension and behavioural difficulties.

A focus on impulse noise

Impulse noise differs from continuous noise because it involves a rapid rise and fall in sound pressure, with intensity well above background levels. Usual noise metrics may underestimate its effects, while sudden peaks can cause more frequent and severe hearing damage than continuous noise at equivalent energy doses.

Sources include hammering, automobile body work, industrial impact processes, shooting ranges and firecrackers. In Malta's compact neighbourhoods, such short, high-intensity sounds can be especially intrusive when homes, roads, industrial and entertainment activity are close together.

Impulse noise can trigger microarousals, brief three-to-fifteen-second intrusions into sleep.

Although microarousals can occur naturally, repeated additional awakenings may impair sleep's restorative function. Research shows that higher indoor noise increases the odds of awakening from aircraft and road noise.

Public health interventions and recommendations

Structural interventions are the most effective way to address night-time noise because they reduce exposure at source rather than shifting responsibility onto individuals. For Malta, recommended upstream measures include:

• Lower night-time speed limits
• Low-noise road surfaces
• Promotion of electric vehicles
• Restrictions on heavy traffic and other noisy night-time activities
• Curfews for night flights and entertainment venues
• Integration of noise assessment into urban planning and transport policy

The most effective public health strategy is source control through coordinated regulation, enforcement, robust urban planning, transport policy and upstream societal measures, particularly in residential areas affected by traffic, nightlife or other late-night activities, to reduce population-wide exposure and protect sleep before noise becomes a health burden.

A health-protective approach should ensure that residents can sleep safely and comfortably with their bedroom windows open. This is especially important in Malta, where summers are particularly hot and heatwaves are becoming more frequent and more intense, making reliance on closed windows and air-conditioning an inequitable and unsustainable response to night-time noise.

Conclusion

Night-time noise pollution should not be treated as an unavoidable inconvenience, but as a serious public health concern. Protecting sleep means recognising the physical and mental health consequences of repeated exposure and addressing the problem before it enters people's homes. In Malta, source-focused action can create quieter, healthier neighbourhoods while allowing transport, commerce and leisure to operate more responsibly.

https://maphm.org/2026/09/03/sleepless-nights-how-night-noise-is-undermining-public-health/

Dr Terence Micallef is Higher Specialist trainee in Public Health Medicine

Dr Maria Griscti Soler, Basic Specialist trainee in Public Health Medicine

Dr Roberto Debono, Consultant in Public Health Medicine

Malta Association Public Health Medicine are full members of Malta Health Network - www.maltahealthnetwork.org