IPhone's own map navigation has sound, and at the same time, it can adjust the strength of the sound. Taking iPhone 7 as an example, the adjustment method is as follows:

First, open the iPhone 7, find "Settings" on the desktop of the iPhone 7 and click to enter.

2. After entering the settings, find the "Map" item in the drop-down menu, and then click Enter.

Third, after entering the map, you can adjust the volume of map navigation under the voice navigation volume item.