To give a speech in your dream indicates that you need to vocalize your feelings and thoughts. You need to communicate something important and/or urgent. Alternatively, the dream may be highlighting your fear and nervousness of speaking in public, especially if the speech goes wrong or if the audience is unruly.
To dream that there is no one listening to your speech suggests that you are not being acknowledged for your work or achievements. Perhaps you are feeling ignored, neglected, or overshadowed.
To hear a speech in your dream suggests that your inner feelings are being made known to those around you. Consider what is said in the speech. If you hear a politician give a speech, then it represents egotism, deceit or pride.