And when the voice of the trumpet shall give a longer and broken tune, and shall sound in your ears, all the people shall shout together with a very great shout, and the walls of the city shall fall to the ground, and they shall enter in every one at the place against which they shall stand.
Joshua 6:3 Go round about the city all ye fighting men once a day: so shall ye do for six days.
Joshua 6:4 And on the seventh day the priests shall take the seven trumpets, which are used in the jubilee, and shall go before the ark of the covenant: and you shall go about the city seven times, and the priests shall sound the trumpets.
Joshua 6:5 And when the voice of the trumpet shall give a longer and broken tune, and shall sound in your ears, all the people shall shout together with a very great shout, and the walls of the city shall fall to the ground, and they shall enter in every one at the place against which they shall stand.
Joshua 6:6 Then Joshua, the son of Nun, called the priests, and said to them: Take the ark of the covenant: and let seven other priests take the seven trumpets of the jubilee, and march before the ark of the Lord.
Joshua 6:7 And he said to the people: Go, and compass the city, armed, marching before the ark of the Lord.
The verse centers on "voice", "trumpet", "shall", "give", "longer", "broken", and "tune". It is saying that the verse draws attention to "voice" and "trumpet", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 4's "And on the seventh day the priests..." into verse 6's "Then Joshua the son of Nun called...", so "voice" and "trumpet" belong inside that flow. In Joshua context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "voice" and "trumpet" with trust shaped by these words, not by a vague optimism outside the passage.