Here’s an experiment you can do.
You may have seen this guide for Polish train station announcers.
1: With a friend, find a busy street to stand on/ another noisy place
2: Open this text on your phone.
3: Ask your friend to stand about 5 metres away and tell them to listen for information.
4: Read it out aloud. Be careful to make your voice unclear, e.g. speak down your nose, put your hand over your mouth.
5: Check your friend’s understanding. If s/he does not understand, send your letter of application to Polish State Railways – you’ve got a long career ahead of you!