What is imagery of the poem of telephone conversation?

The poem "Telephone Conversation" by Wole Soyinka uses vivid imagery to depict the racial discrimination experienced by a black man seeking a place to live. The poet describes the man's skin color as "sooty", the landlady's voice as "brassy", and the man feeling like a "half-caste" caught in between two worlds. These images highlight the underlying racial tensions and prejudices present in the conversation.