The Music That Influences

The tempo of a store's background music regulates, without customers' knowledge, their speed of movement and spending. Slow music makes them linger—and buy more.

In 1982, researcher Ronald Milliman conducts in a supermarket an experiment that becomes a reference: by alternating slow and fast music, he measures that customers slow down on slow tempo and that revenue increases markedly, without their being conscious of it. The tempo of background music regulates, without customers' knowledge, their speed of movement and spending.

The industry had anticipated the intuition. Founded in 1934, the Muzak company theorizes "Stimulus Progression": musical sequences calibrated to sustain attention or regulate customer rhythm according to hours. Music ceases to be an amenity to become an operational parameter—slow music makes people linger, and lingering makes them buy.

Subsequent work refines the effect: a classical repertoire raises the average basket in a wine cellar, a fast tempo accelerates rotation in a café. Sound acts as an implicit clock that commerce adjusts to its convenience, proof that sonic ambiance is an economic lever as much as an aesthetic one.