Crunchy foods might benefit your stress levels, too.
Dr. Spence says that sound is a tactic food businesses have used for decades. He has partnered with companies like Unilever to provide a new way of product innovation that tests how consumers might respond to foods depending on their crunchiness. “It’s like a prototype in a way. We virtually changed the sounds of the foods people were eating to see what they liked, to determine the sound they want of crunchy, crisp, or crackly to engineer that product,” he explains.
Dr. Spence posits that to our brains, crunchiness might indicate freshness, making it more appealing to the senses. “In the case of fresh produce, like fruits and vegetables, fresher produce tends to be noisier and has a higher nutrient value. Whereas, as they tend to get older, they lose some of their nutritional value. In evolutionary terms, this might be why we like noisier foods, as this might signal freshness,” Dr. Spence says.
He also notes that crunchiness helps redirect the attention to the activity of eating. “Mostly when we eat, we don’t really pay attention to what we’re consuming. We’re on mobile devices, chatting, or watching television. Rarely is our attention on what we’re tasting,” he explains. However, noisy food draws your attention to your mouth, which Dr. Spence says may make you more mindful of what you're consuming and create a potentially more enjoyable experience.
“When you eat something and keep eating it, you adapt to it. It fades into the background because of habituation or adaptation, and it doesn’t taste as much as it did when you first bit into it. This desensitization happens more slowly if the food is noisy. Meaning noisy foods can be enjoyed for longer because the sound can help prolong the [sensory] experience,” Dr. Spence says, adding that current research is studying these effects.
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