This is a small detail that Tagore uses in order to bring out the character of Ratan. It is really minor, but like so much in Tagore's writing, the minor and small elements occupy great importance as they reveal much about the character. Ratan hears the postmaster's call. She deliberately does not answer. One reason she does not immediately answer is because she is so very happy to be needed. Ratan is an orphan in the village, and has not been in a situation where she is needed or even included. In not immediately responding to the postmaster, she allows herself the need to feel wanted, something that has been lacking in her own life for quite some time as she has been an orphan. At the same time, there is an existential reason why she wishes to hear her Dadababu's voice again. Ratan has been used to silence all her life. The lack of any human connection has created a setting where silence is her only companion. In hearing someone call her repeatedly, Ratan experiences noise and sound where there had been silence or emptiness. This is the reason why she yearns to hear his voice more than simply one time, for it removes the vacuum of emptiness that her life had been before meeting the postmaster.