Gregor was shocked when he heard his own voice answering, it could hardly be recognised as the voice he had had before. As if from deep inside him, there was a painful and uncontrollable squeaking mixed in with it, the words could be made out at first but then there was a sort of echo which made them unclear, leaving the hearer unsure whether he had heard properly or not.
Gregorio se asustó, al contestar, escuchó una voz que, evidentemente, era la suya, pero en la cual, como des de lo profundo, se mezclaba un doloroso e incontenible piar, que en el primer momento dejaba salir las palabras con claridad para, al prolongarse el sonido, destrozarlas de tal forma que no se sabía si se había oído bien.