Final answer:
A psychologist working in the research specialty of sensation and perception would explore how a person can recognize someone's voice over the telephone by interpreting pitch.
Step-by-step explanation:
A psychologist working in the research specialty of sensation and perception might explore how a person is able to recognize someone's voice over the telephone by interpreting pitch. Pitch perception is the perception of frequency and is directly related to the frequency of sound. By studying sensation and perception, psychologists can gain insights into how our senses interpret and understand the world around us.