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return of part of the output (of a circuit, amplifier, etc.) to the input (Electronics); information about the results of a certain procedure; response; critique, critical analysis

A process which changes the relationship between a forcing of the climate and the response of the climate to that forcing. This type of process is often referred to as a feedback mechanism. Climate feedbacks can amplify the response of the system to an externally imposed perturbation.

A loud whistle or rumble heard emanating from a sound system. It is caused by a sound being amplified many times. (E.g. a sound is picked up by a microphone and amplified through the speaker. The microphone picks up this amplified sound and it is sent through the system again). Feedback can be avoided by careful microphone positioning, and can be reduced by use of Equalisation to reduce the level of the frequency band causing the feedback.

A signal sent to the device user to indicte what selections exist, when to make a selection, and which selection was made. Feedback can consist of visual, auditory, or tactile.

reply, response, reaction to a plan, splashback """What is the feedback on our plan to cut education funds?"" ""Negative. People disapprove."""

Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. The system can then be said to feed back into itself. The notion of cause-and-effect has to be handled carefully when applied to feedback systems:
"Simple causal reasoning about a feedback system is difficult because the first system influences the second and second system influences the first, leading to a circular argument. This makes reasoning based upon cause and effect tricky, and it is necessary to analyze the system as a whole."

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the mechanism in the communication process which allows the sender to monitor and evaluate the receiver's response to a message. See Communication Process.

1. the process in which part of the output of a system is returned to its input in order to regulate its further output
(hypernym) natural process, natural action, action, activity
(hyponym) negative feedback
(derivation) feed back, resubmit
2. response to an inquiry or experiment
(hypernym) answer, reply, response
(derivation) feed back

The return of a portion of the output signal to a device's input. A common source of feedback is sending the output of a guitar amp's speaker into a guitar's pickups, by stepping close to the amp.

In acoustics, the undesirable leakage of audio from loudspeakers back into a microphone, resulting in a loud squeal or howling sound, or in less severe cases, a hollow ringing sound quality or whistles.

Both 'F' hands are positioned in front of the face, the left facing in and the right facing out. They move in and out alternately, changing from 'F' to 'B' each time.

Communication from customers about how delivered products or services compare with customer expectations.

The process of conveying information between client and helper.

The flow of information back to the learner so that actual performance can be compared with planned performance.

Feedback - The transmission of current or voltage from the output of a circuit or device back to the input, where it interacts with the input signal to modify the operation of the circuitor device.Firefighter's Service - A device or group of devices which provide (1) a signal for immediate recall to a designated landing in order to remove cars from normal use, and (2) to permit special operation for firefighters or other authorized emergency personnel.

1) The insertion of a delayed program signal back to the input for use in echo effects. 2) The pickup and re-amplification of an output signal by its input resulting in an unwanted "howling" sound.

Many biologic processes are controlled by feedback, just as the temperature in a home from a furnace is regulated by a thermostat.

communication, verbal or non-verbal, that is communicated back to the message sender.


The circulating action between a sensor measuring a process variable and the controller which controls or adjusts the process variable .


1. The return of part of the output of a system to the input. Negative feedback causes self-adjustment of the system and therefore stability . Positive feedback causes instability. See closed loop system .
2. The information that a computer-controlled fuel system returns. The sensor measures the oxygen content of the engine's exhaust in order to keep the fuel-air ratio very close to the ideal proportion for combustion. Such tight control of the fuel-air ratio is required for the proper operation of three-way catalysts.

1. The return of a portion of the output, or processed portion of the output, of a (usually active) device to the input. (188 ) Note 1: The feedback signal will have a certain magnitude and phase relationship relative to the output signal or the input signal. This relationship can be used to influence the behavior, such as the gain and stability, of the overall circuit. Note 2: If the feedback is regenerative (additive), it is called "positive feedback," which increases gain and distortion, and decreases linearity and stability. Note 3: If the feedback is degenerative (subtractive), it is called "negative feedback," which reduces the gain and distortion, and increases linearity and stability. Note 4: Feedback may occur inadvertently, and be detrimental. 2. Information returned as a response to an originating source.

The return of some output back into the input. The returning of light back into the laser cavity in a distributed feedback laser.

Providing learners with information about the nature of an action and its result in relation to some criterion of acceptability. It provides the flow of information back to the learner so that actual performance can be compared with planned performance. Feedback can be positive, negative, or neutral. Feedback is almost always considered external while reinforcement can be external or intrinsic (i.e., generated by the individual).

reply, response, reaction to a plan, splashback "What is the feedback on our plan to cut education funds?" "Negative. People disapprove."

information about the results of a process which is used to change the process itself. Negative feedback reduces the error or deviation from a goal state. Positive feedback increases the deviation from an initial state. (Umpleby ) A flow of information back to its origin. A circular causal process in which a system 's output is returned to its input, possibly involving other systems in the loop. Negative feedback or deviation reducing feedback decreases the input and is inherently stabilizing (see stability, regulation , homeostasis ), e.g., the governor of a steam engine. Positive feedback or deviation amplifying feedback increases the input and is inherently destabilizing, explosive or vicious, e.g., the growth of a city when more people create new opportunities which in turn attract more people to live there. Feedback is not the term for a response to a stimulus rather for the circularity implied in both. (Krippendorff )

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