What part of the brain is responsible for response or reflex to loud noises?

The part of the brain primarily responsible for responding to loud noises is the auditory cortex, located in the temporal lobe, which processes sound information. Additionally, the amygdala plays a crucial role in emotional responses, including fear, which can be triggered by loud sounds. The brainstem, specifically the inferior colliculus, also contributes by mediating reflexive responses to sudden auditory stimuli. Together, these regions enable quick reflexive actions to loud noises.