Revise Sound and consumer behaviour for Cambridge 9990 (2.1.2)

Sound is a critical component of a store's 'atmospherics' – the deliberate design of an environment to evoke specific emotional and behavioural responses in consumers. Far from being mere background noise, auditory cues like music, announcements, and even ambient sounds are strategically employed to influence how shoppers think, feel, and act. This process can be understood through the Mehrabian-Russell Stimulus-Organism-Response (S-O-R) model, where the music (Stimulus) affects a shopper's internal emotional state or 'arousal' (Organism), which in turn drives their behaviour, such as browsing speed or purchase decisions (Response). The ultimate goal is to create an environment that encourages desired consumer actions, whether that is lingering longer, spending more, or simply perceiving the brand in a more positive light.

The speed or tempo of music has a well-documented impact on consumer behaviour. The classic field experiment by Milliman (1982) in a supermarket demonstrated this powerfully. When slow-tempo music (under 72 beats per minute) was played, shoppers moved at a slower pace, spent significantly more time in the store, and their sales volume was 38% higher than on days with fast-tempo music. Conversely, fast-tempo music (over 94 beats per minute) led to faster movement through the aisles and lower overall sales. The underlying mechanism is that tempo influences physiological arousal and our subjective perception of time. Slow music is calming, encouraging a leisurely pace conducive to browsing and impulse buys, while fast music creates a sense of urgency.

The volume of in-store music is a delicate balance. Research by Smith and Curnow (1966) found that loud music, compared to no music, significantly decreased the amount of time shoppers spent in a supermarket. High volume can increase physiological arousal, but if it becomes overwhelming or intrusive, it creates a stressful environment that triggers 'avoidance' behaviours, such as leaving the store quickly. This effect is often moderated by age and store type. For example, loud, high-energy music is a deliberate atmospheric choice in fashion stores targeting younger consumers to create an exciting brand identity. In contrast, for a bookstore or a shop catering to an older demographic, the same volume would likely be detrimental to the customer experience and sales.

The genre of music is arguably as important as its tempo or volume. The principle of 'congruency' suggests that music is most effective when it 'fits' the products, brand image, and target clientele. For instance, playing classical music in a luxury watch shop feels appropriate and enhances the perception of quality. A key study by North et al. (1999) demonstrated this through cognitive priming. When French music was played in a supermarket's wine aisle, sales of French wine outsold German wine, and the reverse happened when German music was played. Crucially, shoppers were unaware of this influence. The music made knowledge related to that nation more accessible, subtly nudging their choice without their conscious awareness.