How do you recognise your friend by hearing his voice on a telephone?

I recognize my friend by the unique tone and pitch of their voice, which is familiar to me from our conversations. Their specific speech patterns, such as the way they phrase sentences or use certain expressions, also help me identify them. Additionally, the emotional nuances in their voice can convey their mood, further confirming their identity. Together, these elements create a distinct auditory signature that I associate with my friend.