When I enter a distance on my health app, when I reach certain distance achieved, the "voice" that gives me info on my status, distance, time, steps etc. speaks so fast I cannot understand what is said. I tried "slowing speech speed" on talk to text but has no bearing on it. I have an A 54 5g and no where in settings does it give me any options to slow speech down, nor does the health app itself. I have rebooted both phone and Galaxy 5 watch, again, no change.
I do not believe it is possible to slow the voice on the voice guide. I don't know what's causing it to speed up. I assume it's a normal speed up to that point. You might try clearing the cache to the health app. Settings/apps/Samsung Health (or long press on the app icon and tap the circled "i"). Scroll down to "storage", tap the text and select "clear cache" on the bottom of the screen. If you can't understand the audio guide, you can always take a look at your phone or watch, the statistics should show on the screen.
You might try Settings > accessibility > Talkback > Talkback settings > Text-to-speech adjust speech rate or tap reset and make sure your text-to-speech engine is using Samsung text-to-speech engine. I may be wrong but that's the only thing I can think of that controls speech rate in settings.
