Why Smell is More Than Just Odour: Explaining the Neuroscience of Smell

Odour is often thought of simply as a pleasant scent or an unpleasant smell.

Smell has a powerful influence on how we think, feel and experience the world around us. Unlike our other senses, smell has a unique relationship with the brain, influencing how we perceive environments, respond emotionally and form memories.

This connection is particularly important in industrial environments, where persistent or unpleasant odours can be more than an environmental nuisance. Wastewater treatment plants, waste processing facilities and manufacturing sites can all generate challenging odours that affect employees, visitors and surrounding communities, while contributing to complaints and regulatory pressures.

Understanding the science behind our sense of smell helps explain why odour management is about more than simply removing an unpleasant smell. For businesses managing challenging environments, effective odour control can support compliance, reduce complaints and help create more comfortable spaces for the people who interact with these sites.

How Does Our Sense of Smell Work?

When we encounter an odour, molecules travel through the air and enter the nose, where they interact with specialised receptors. These signals are then processed by the olfactory system, which sends information to areas of the brain involved in identifying and interpreting smells.

Smell has particularly direct connections with areas of the brain involved in emotion and memory, including the amygdala, which plays an important role in emotional responses, and the hippocampus, which is closely associated with memory formation.

This close relationship helps explain why certain odours can trigger strong emotional responses or bring back vivid memories. Research has highlighted the role of smell in shaping mood, memory and perception, making it an important part of how we experience our surroundings.

How Does Odour Affect Wellbeing and Our Experience of the Environment?

Our surroundings can influence how we feel and respond, with sensory experiences such as smell playing an important role in how we perceive the spaces around us.

Research in retail environments has found that an inviting scent can lead to a 20% increase in spending, an 84% increase in purchase intent, and attract three quarters of people to a store.

While industrial sites are very different from retail environments, these findings demonstrate the wider influence smell can have on human perception and behaviour. If pleasant scents can positively influence how people experience a space, it follows that persistent unpleasant odours may also shape perceptions of a site or facility.

How Odour Can Influence Mood and Perception

The relationship between scent and emotion is increasingly recognised, with 85% of people believing that positive scent experiences can influence mood and perception.

This understanding has developed over thousands of years, from traditional aromatherapy practices to modern scientific research into aromachology.

While aromatherapy historically focuses on the use of natural essential oils, aromachology uses scientific research to explore how different scent profiles can influence human responses. This highlights the importance of understanding odour scientifically, rather than simply masking it.

For businesses, understanding how odours are perceived can support a more informed approach to environmental management.

Stress, Odour and Better Environments

Stress is a growing global concern, and the environments people work and live in can influence their overall experience.

Unpleasant or persistent odours can contribute to negative perceptions of a location, affecting comfort, wellbeing and community relationships. For industries such as waste management, recycling, manufacturing and wastewater treatment, effective odour management can therefore play an important role in maintaining positive relationships with employees, visitors and neighbouring communities.

The Role of Businesses in Supporting Better Experiences

Employees, visitors and surrounding communities increasingly expect organisations to consider wellbeing, environmental responsibility and the impact of their activities.

Research from Vitality found that 55% of employees would like more personalised health and wellbeing support, while 61% said they would be more likely to engage with wellbeing interventions if they were tailored to their individual needs. The research also found that 52% of employees felt workplace health and wellbeing initiatives were little more than a “tick-box exercise”. The findings were based on a survey of 1,000 employees across different levels of seniority.

This reinforces the importance of creating environments that are not only compliant, but also considerate of the people who interact with them. Supporting wellbeing is not simply about formal initiatives. It also means considering the everyday environmental factors that shape how people experience a space.

Source: COVER Magazine, ‘Half of employees want more personalised health and wellbeing support’, 6 August 2026. Read the full article

Applying Neuroscience to Odour Management

At Probe Industries Ltd, we recognise that odour is more than a technical challenge. It’s a human experience.

By understanding how the brain processes smell, businesses can take a more informed approach to managing odours.

Effective odour control solutions can help reduce unwanted odours, improve environmental experiences and support better relationships between sites and their surrounding communities.

The science of smell shows us that odour is not simply detected.

It is interpreted, remembered and experienced.

 Discover how Probe Industries applies this understanding through AiroVive, our premium fragrance range designed to enhance environments through carefully developed scent experiences.

https://probeindustriesglobal.com/introducing-our-brand-new-product-airovive/