The sound was so loud that it fainted all warriors fighting for Kauravas and they stunned in unconscious state so deep as the arms/weapons in their hands were dropped down when the conch was blown by Arjuna.
ते शङ्खनादेन कुरुप्रवीराः सम्मोहिताः पार्थसमीरितेन। उत्सृज्य चापानि दुरासदानि सर्वे तदा शान्तिपरा बभूवुः॥