These days we are seeing online classes. Many students are not concentrating on hearing the voice of the teacher. They will be just sitting before the phone and thinking something else or playing with a book. They will not understand the lesson. Here also the problem is with the receiver only,
But there may be some cases where the communicator may not understand the level of the receiver and may be using a very high standard in his talking. So the communicator should use simple and easy language so that the receiving person can easily understand.
"Life is easier when you enjoy what you do"