If someone speaks too loudly into a microphone, a public address system will sometimes produce a loud whistle of amplified feedback. Explain whether this is an example of negative or positive feedback, and explain how the microphone, control box, and speaker of the system serve as the different components of a feedback loop.
What will be an ideal response?
This is an example of positive feedback, where the mic is a receptor (it receives the input), the control box is a control center (it has knobs to adjust settings), and the speaker is an effector (it ultimately produces the sound).
You might also like to view...
The number of bones in the adult human skeleton is
A. 80. B. 126. C. 206. D. 412.
The loose-fitting sac around the heart is the
A. fibrous pericardium. B. visceral pericardium. C. endocardium. D. epicardium.
Where is the flexor carpi radialis?
a) D b) E c) F d) G e) H
When bicarbonate levels fall due to an accumulation of fixed acids in the body, the result is
A. metabolic alkalosis. B. respiratory alkalosis. C. respiratory acidosis. D. metabolic acidosis. E. insufficient respiration.