Final answer:
The patient's symptoms suggest a lesion in the temporal lobe, which is responsible for auditory processing, memory formation, and emotional response.
Step-by-step explanation:
The patient's symptoms of auditory illusions, olfactory hallucinations, and emotional changes indicate a lesion in the temporal lobe. The temporal lobe is responsible for auditory processing, memory formation, and emotional response. It contains the primary auditory sensation areas and is part of the limbic system associated with memory.