स घोषो धार्तराष्ट्राणां हृदयानि व्यदारयत्। नभश्च पृथिवीं चैव तुमुलो व्यनुनादयन् ॥

sa ghoṣho dhārtarāṣhṭrāṇāṁ hṛidayāni vyadārayat nabhaśhcha pṛithivīṁ chaiva tumulo nunādayan

That tumultuous uproar rent the hearts of the sons of Dhritarâshtra, filling the earth and sky with sound.

In plain words: The huge roar from the Pandava side fills earth and sky. It shakes the hearts of Dhritarashtra's sons with fear.