To dream of waves, is a sign that you hold some vital step in contemplation, which will evolve much knowledge if the waves are clear; but you will make a fatal error if you see them muddy or lashed by a storm.
See also: Ocean, Sea
To see a tidal wave in your dream represents an overwhelming emotional issue that demands your attention. You may have been keeping your feelings and negative emotions bottled up inside for too long. On a positive note, the tidal wave symbolizes the clearing away of old habits.
If you are carried away by the tidal wave, then it means that you are ready to make a brand new start in a new place.
To dream that you can create a tidal wave with your mind is analogous to your ability to control your emotions and keep them in line.
To see or make sound waves in your dream indicates that you are in tune with your own feelings or the feelings of others.
Alternatively, sound waves symbolize the ups and downs of your emotions.