Whether background sounds are beneficial or not seems to depend on what kind of noise it is—and the volume. In a series of studies published last year, Ravi Mehta from the College of Business at Illinois and his colleagues tested people’s creativity while exposed to a soundtrack made up of background noises—such as coffee-shop chatter and construction-site drilling—at different volumes. They found that people were more creative when the background noises were played at a medium level than when the volume was low. Loud background noise, however, damaged their creativity.

　　Many teachers all over the world already play music to students in class. Many are inspired by the belief that hearing music can boost IQ in later tasks, the so-called Mozart effect. While the evidence actually suggests it’s hard to say classical music boosts brainpower, researchers do think pleasant sounds before a task can sometimes lift your mood and help you perform well, says Perham, who has done his own studies on the phenomenon. The key appears to be that you enjoy what you’re hearing. “If you like the music or you like the sound—even listening to a novel—then you do better. It doesn’t matter about the music, ”he says.

　　So, it seems that schools that choose to prevent disturbing noises and create positive soundscapes could enhance the learning of their students, so long as they make careful choices. Yet this isn’t the only sense being used to affect learning. Special educational needs students at Sydenham high school in London are being encouraged to revise different subjects in the presence of different smells—grapefruit scents for maths, lavender for French and spearmint for history.

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