Scholars added other components to the speaker, message, and listener making a total of 7 components after found out the limitations of the linear model.
channel, feedback, environment, and noise
Channel—the medium, or the way the message is sent.
Feedback—includes all messages, verbal and nonverbal, sent by listeners to speakers.
Environment—the physical setting and the occasion for communication.
Noise—anything that distracts from effective communication; some form of noise is always present.