I posted this earlier as a discussion because I thought Apple had a fix. Basically, Siri does not speak out loud through iPhone speakers, only through ear buds or small ear speaker in the phone. No "Ding" sound to indicate Siri has started or finished recording. She will not speak out loud any of her feedback. We've tried the following:
Ensured Voice Feedback was set to "Always"
Turning off Siri followed by soft reset & restart, then turning Siri back on
Checking volume of speakerphone (obviously)
Reset all settings to factory default
Restoring iPhone from backup
Changing language from US English to Australia, restarting then, changing back again (doesn't work in Australian either)
Turning off Raise to Speak (and turning back on)
There may have been other things we've played with over the past few days, but I can't remember them all. If you have any suggestions, please let me know!
Here's my final answer: Activate Siri, and turn the volume up!!! Apparently, I turned the volume down while it was shouting at me somewhere I wanted it to be quiet! Never connected the dots. So, for anyone having this issue, the fix is pretty simple. Now if I can figure out how to get Apple Care to add it to their trouble-shooting list!