Final answer:
We begin to ignore familiar noises or details because we deem them insignificant; this is known as habituation. Habituation is a simple form of learning that allows us to get used to non-threatening repeated stimuli and occurs in almost all animals.
Step-by-step explanation:
When we start to ignore a noise or detail such as a bird chirping or a poster we see daily, it occurs because we have determined that it is B. Insignificant. This phenomenon is known as habituation, which involves getting used to something that is not dangerous, even if it might be annoying or frightening initially. Habituation is a basic form of learning and can occur in nearly every species of animal. Examples of habituation include tuning out the sound of a television while reading a book or not noticing familiar sounds of traffic. Other psychological concepts, such as signal detection theory, are related to our ability to discern meaningful stimuli from background noise.For example, when we hear a bird chirping or see a poster in the hallway every day, we may begin to ignore them because we have become habituated to the sounds or visuals. This habituation occurs because our attentional filters prioritize other stimuli that we consider more important or relevant.