They used to teach speaking and enunciation etc. differently in acting/radio/tv differently, than now, apparently. My dad had to learn all these specific ways

They used to teach speaking and enunciation etc. differently in acting/radio/tv differently, than now, apparently. My dad had to learn all these specific ways to enunciate and they made them do practice work. He was in communications in the military and later for the whitehouse and then radio and TV after the military. It is interesting to see differences over the decades.