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Consciousness of a bat is using echolocation sonar. The purpose of it is to catch flying insects at nights. in a psychological perspective, cocktail sound is from our ear is able to allocate where it is coming from. A great music or sound is able to ease our depressing or stress mode. For example, walking in the middle of the night searching for water inside the fridge. The soundwave of the fridge entering my eardrums. Is able to locate the fridge to drink a fresh cool water. In a dark places, a minor light, or sound. It is divulging ourself into a darkness path; There is a chance for growth, and learning our footstep.