So what does our sense of hearing tell us about food? Imagine being blindfolded and hearing two sticks of celery snapped by your ear, one giving off a crisp ‘crack’ and the other less so. Which stick of celery would you prefer to eat? In this case, the sound tells us that the celery has the crisp, crunchy texture we desire, that it is fresher and of superior quality and presumably packed with more of the vitamins and nutrients that our bodies instinctively seek out. As with many things, this comes back to primal instincts; the link with freshness is thought to be part of the evolutionary appeal of crisp and crunchy foods.