When you are a musician you can usually hear tone pretty well. Tone, not to be confused with tune, can change a song drastically. If the tone is wrong then everything sounds wrong. It’s like that when we are talking with people. If our tone is unpleasant then it may seem like we are saying something other than what we mean. If your tone sounds irritated then people will automatically think you are annoyed. If your tone sounds happy then people think you are happy.
It’s like speaking with an animal. If I say in a high tone, “let’s go to the groomer’s today buddy!” My dog gets very excited, even though he hates being groomed, he loves the car ride though.
It’s easy to forget your tone when speaking. I do a lot of physical activity so pain is not an uncommon thing, unfortunately. When in pain I have been criticized for having an angry or irritated tone. It’s just the way I sound when I am pushing through a day of pain. Making myself sound happy takes too much effort and wears me out when I am injured. I realize that my tone bothers people though. Tone can change a whole conversation. So when speaking, try to tune your ear to your tone.