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.
The types of communications systems are usually discernible by the primary medium through which the information is transmitted. Communication systems may also be classified as one-way, two-way, or multiple-way systems, depending on how many parties can exchange information through its various components. One example is a radio communication system.