Slow Respiratory Rate. When a person's respiratory rate is slower than normal, certain conditions, such as bradypnea or apnea, may occur. Bradypnea is characterized by abnormally slow breathing, and may be the symptom of a metabolic disorder or a tumor.
There are a great many different modes of communication, which include speech, writing, communication in person or communication at a distance by means of radio, telephone, television, telegraph, etc.; there are many different languages which can be used, including sign language which is non-verbal.
Communication theorists examine messages from a semiotic perspective (the study of signs and symbols, and how meaning is created through them; note: it is not the study of meaning, just how meaning is created). For example, a commencement speaker produces meaning through several criteria.