2.2 - Sound & Consumer Behaviour
Introduction to sound and consumer behaviour
Sound plays a significant role in shaping how people behave as consumers, often without them realising it. This can include background music in shops or restaurants, which might encourage more spending, or noise levels that alter how food tastes. Understanding these effects helps explain why businesses carefully control auditory environments to influence customer decisions.
Key concepts in sound and consumer behaviour
- Consumer behaviour - The actions and decisions people make when buying or using products and services, including spending patterns and perceptions of quality.
- Atmospherics - Elements of an environment, such as music or lighting, that affect mood and behaviour in retail or dining settings.
- Sensory perception - How the brain interprets information from the senses, which can be influenced by sound to change experiences like taste.
These concepts show that sound is not just background noise but a tool that can prime customers - subtly preparing them - to spend more or enjoy products differently.
Key study: North et al. (2003) on music and spending
This study explored how different types of music in a restaurant setting can affect how much diners spend. It built on earlier findings that classical music can make places seem more upscale, potentially leading to higher spending.
Method
- Research approach - This was a field experiment conducted in a real-world restaurant to observe natural behaviour.
- Design - Independent measures design, where different groups of participants experienced different conditions without repeating them.
- Variables - The independent variable was the type of music played: classical, pop, or no music. The dependent variable measured average spending on starters, coffees, total food bill, and overall spend, as well as time spent in the restaurant.
- Sample - An opportunity sample of 393 male and female diners in an affluent town in the UK, selected based on who happened to visit during the study period.
- Procedure - Over three weeks, for six nights each week, a waitress recorded spending in an expensive restaurant. The music condition (classical, pop, or none) was rotated, with controls for volume, lighting, menu, and temperature to ensure consistency.
- Data collection - Observation by the waitress, noting spending without diners' awareness to maintain natural behaviour.
- Ethics - Privacy was protected by not identifying individuals, and lack of informed consent was justified as informing diners might alter their natural spending habits.
Results
The study found clear differences in spending based on the music:
| Spending category | Classical music (£) | Pop music (£) | No music (£) |
|---|---|---|---|
| Starters | 4.92 | 4.04 | 3.93 |
| Coffee | 1.07 | 0.80 | 0.54 |
| Total food bill | 24.13 | 21.91 | 21.70 |
| Overall spend | 32.51 | 29.46 | 29.73 |
- Spending was highest with classical music across all categories compared to pop or no music.
- No significant differences were found in time spent in the restaurant.
Conclusions
Classical music appears to increase spending, possibly because it enhances the overall atmosphere, boosts enjoyment or arousal, or primes customers to associate the setting with luxury, encouraging them to spend more. This supports prior research showing classical music can make environments seem more upmarket.
Background noise and taste perception
Beyond spending, sound can influence how food tastes, with background noise often reducing the intensity of flavours. This area draws on several studies showing that noise acts as a distraction or stressor, altering sensory experiences.
Previous research on noise and taste
- Zampini and Spence (2004) - Artificially louder chewing sounds made crisps seem fresher, showing how auditory cues enhance perceptions.
- Masuda et al. (2008) - White noise - a constant, neutral sound like static - made pretzels taste less moist, demonstrating noise's role in diminishing certain qualities.
- Other findings - Background noise increased preference for sweet tastes but not salty ones.
Key study: Woods et al. (2011) on noise and food perception
This research examined how noise levels affect the perceived intensity and liking of different foods.
Method
- Research approach - Laboratory experiment with controlled conditions to isolate noise effects.
- Design - Repeated measures design, where the same participants experienced all conditions to reduce individual differences.
- Variables - Independent variable: loud white noise, quiet white noise, or no noise. Dependent variables: ratings of sweetness, saltiness, liking, and intensity for soft, hard, sweet, and savoury foods.
- Participants - A group who rated foods while listening to the noise conditions.
- Procedure - Participants wore blindfolds to eliminate visual influences and rated standardised portions of foods under each noise condition.
Results
- Taste intensity was lower in loud noise compared to quiet or no noise, with sweet foods affected more than salty ones.
- Liking for foods was highest in quiet conditions and lowest in noisy ones.
- Food hardness (soft vs. hard) did not influence intensity or liking ratings.
Conclusions
Background noise negatively impacts perceptions of sweetness and saltiness, regardless of food texture. This suggests noise distracts from taste or combines with other senses to reduce flavour intensity.
Explanations for why sound affects taste
- Stress response - Noise acts as a stressor, increasing cravings for sweet foods as the body seeks quick energy.
- Neural activation - Studies with rats show sound stimulates about 19% of neurons in the olfactory tubercle - a brain area linked to smell and pleasure - which may alter taste processing.
- Multisensory integration - The brain combines inputs from multiple senses; louder sounds can overpower taste signals, making flavours seem less intense.
- Distraction effect - High noise levels divert focus, reducing the ability to fully appreciate subtle tastes.
Evaluation of key studies
Both North et al. (2003) and Woods et al. (2011) provide valuable insights but have strengths and limitations that affect their reliability and applicability.
Strengths and weaknesses
| Aspect | Strengths | Weaknesses |
|---|---|---|
| Validity | Confounding variables controlled (e.g., repeated measures in Woods et al. to eliminate participant differences; situational controls like lighting in North et al.). | Artificial elements reduce real-world applicability (e.g., blindfolds in Woods et al. ignore visual cues; no control for musical preferences in North et al.). |
| Generalisability | Samples may not represent wider populations (e.g., affluent UK diners in North et al. limit applicability to other groups). | |
| Replicability | Standardised procedures allow repetition (e.g., fixed portion sizes in Woods et al.; consistent music volume and tracks in North et al.). |
Overall, these studies are robust in controlled settings but may not fully capture everyday consumer experiences.
Issues and debates in sound and consumer behaviour
Research in this area raises broader psychological questions about what drives behaviour, highlighting tensions between different explanatory approaches.
Individual and situational explanations
Situational factors, like background music or noise, can strongly influence spending and taste - for example, classical music as a situational cue to spend more. However, individual differences, such as personal musical tastes or neurodiversity (variations in brain function, like sensitivity to noise in autism), may moderate these effects, suggesting behaviour results from an interaction of person and environment.
Reductionism versus holism
In North et al., a specific atmospheric (music) is isolated to determine its influence on spending, so the study is reductionist. Increased spending may be due to interactions between the music and other atmospherics. A holistic view would consider how music interacts with other atmospherics, such as decor or aromas, to create an overall effect, providing a more complete understanding of consumer behaviour.