How much a microphone can be amplified before causing audio feedback
In live sound mixing, gain before feedback (GBF) is a practical measure of how much a microphone can be amplified in a sound reinforcement system before causing audio feedback. In audiology, GBF is a measure of hearing aid performance. In both fields the amount of gain is measured in decibels at or just below the point at which the sound from the speaker driver re-enters the microphone and the system begins to ring or feed back. Potential acoustic gain (PAG) is a calculated figure representing gain that a system can support without feeding back.[1]
^"Microphone Techniques: Live Sound Reinforcement" (PDF). Shure Educational Publication. Shure. December 2007. p. 36. Archived from the original (PDF) on March 3, 2011. Retrieved May 2, 2011.
and 26 Related for: Gain before feedback information
sound mixing, gainbeforefeedback (GBF) is a practical measure of how much a microphone can be amplified in a sound reinforcement system before causing audio...
Audio feedback Problems playing this file? See media help. Audio feedback (also known as acoustic feedback, simply as feedback) is a positive feedback situation...
details the use of negative feedback in electronic amplifiers. According to Black: Positive feed-back increases the gain of the amplifier, negative feed-back...
positive feedback together with a gain greater than one will result in a runaway situation. Both positive and negative feedback require a feedback loop to...
Mathematically, positive feedback is defined as a positive loop gain around a closed loop of cause and effect. That is, positive feedback is in phase with the...
implemented using a frequency mixer. Only modest improvement of gainbeforefeedback is achieved and the technique creates noticeable pitch distortion...
volume sufficiently. Sound engineers take several steps to maximize gainbeforefeedback, including keeping microphones at a distance from speakers, ensuring...
technique used to prevent audio feedback between on-stage microphones and loudspeakers, and to maximize gainbeforefeedback. Depending on the acoustics of...
amplifiers with feedback for use in telephone networks. He developed the graphical design technique of the Bode plots to show the gain margin and phase...
simultaneously. Automixers uses a variety of methods that allow increased gainbeforefeedback for live sound reinforcement. Automixers are typically used to mix...
component is often used in the feedback loop that provides a 'slow' gain reduction with amplitude. This stabilizes the loop gain at an amplitude below the...
gain margin are two measures of stability for a feedback control system. They indicate how much the gain or the phase of the system can vary before it...
Minor loop feedback is a classical method used to design stable robust linear feedback control systems using feedback loops around sub-systems within the...
Automatic gain control (AGC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a...
products had "massive rejection and controllable gainbeforefeedback" and ensured that the feedback generated by Swift's movements around the audio systems...
cellos. During the album tour, concert sound mixer Brad Madix faced gain-before-feedback challenges when amplifying the strings for a large audience: "I'd...
resistant to moisture. This, coupled with their potentially high gainbeforefeedback, makes them ideal for on-stage use. Dynamic microphones use the same...
reduced the effect of reverberation on soundstages and offered higher gain-before-feedback in live sound applications, making it a staple of the audio recording...
substantially linear with the application of negative feedback. Negative feedback works by sacrificing gain for higher linearity (or in other words, smaller...
relevance feedback is normalized discounted cumulative gain. Other measures include precision at k and mean average precision. Implicit feedback is inferred...
Peer feedback is a practice where feedback is given by one student to another. Peer feedback provides students opportunities to learn from each other...
simplest form a transimpedance amplifier has just a large valued feedback resistor, Rf. The gain of the amplifier is set by this resistor and because the amplifier...
high gain semiconductor circuit with a negative feedback capacitor Cf. Into the inverting node flow the input charge signal qin and the feedback charge...
Global Information