Is it permissible for the worshippers to say "bala" (yes, indeed) aloud after the Imam says, "Is not Allah the most just of judges?"

Some scholars are of the view that glorification (tasbih) upon reciting (Quran 75:40) "Is not He (Allah) able to give life to the dead?" should be done silently, not audibly. As Imam Ahmad said: "If he wishes, let it be to himself, and not audibly." As for supplication (du'a), nothing of it has been legislated to be done audibly, due to the Almighty's saying: (Quran 7:55) "Invoke your Lord with humility and in secret."