sa ghoṣho dhārtarāṣhṭrāṇāṁ hṛidayāni vyadārayat
nabhaśhcha pṛithivīṁ chaiva tumulo abhyanunādayan||19||

Meaning : The loud sound (of the conch shells and war cries) shook the hearts of the Kaurava army. That great noise echoed across the sky and the earth.