F

1. F3:
The roll-off frequency at which the driver's response is down -3dB from the level of it's midband response.
Submitted on Sunday, May 24, 2009 8:46:07 PM

2. F3 (measured in Hz)-The frequency at which the acoustic power output from a system has fallen to one-half its reference value. Known as the systems 3dB down point. F3
Submitted on Thursday, July 24, 2008 8:46:07 PM

3. Fader:-Rather like the right to left balance control, however the fader moves the sonic position between the front and back speakers.
Submitted on Thursday, February 19, 2009 8:46:07 PM

4. Fader:The control that varies the amplitude of the front vs. rear sound. (e.g., When Susan moved the fader to full rear, the front speakers could no longer be heard.)
Submitted on Wednesday, May 20, 2009 8:46:07 PM

5. Fader:
The control that varies the amplitude of the front vs. rear sound. (e.g., When Susan moved the fader to full rear, the front speakers could no longer be heard.)
Submitted on Wednesday, January 07, 2009 8:46:07 PM

6. Farad
The basic unit of capacitance. A capacitor has a value of one farad when it can store one coulomb of charge with one volt across it.
Submitted on Wednesday, April 30, 2008 8:46:07 PM

7. Farad (F):The basic unit of capacitance. A capacitor has a capacitance of 1F when a charge of 1 Volt across the capacitor produces a current of 1 Ampere through it. Named after Michael Faraday.
Submitted on Thursday, January 15, 2009 8:46:07 PM

8. Fb:-The tuned frequency of a Vented Enclosure, measured in Hertz. A combination of the resonance frequency of the air in a Port and the resilient pressure of the air in a Ported System. Below this point the Frequency Response of a Tuned Port system rapidly Falls Off, and the system can become unstable if asked to reproduce lower frequencies at high Amplitude.
Submitted on Friday, February 22, 2008 8:46:07 PM

9. Fb:-The tuned frequency of a ported box.
Submitted on Sunday, August 29, 2010 8:46:07 PM

10. Fc or Fcb
Definition:The system resonance frequency of a driver in a sealed box. The system resonance frequency of a driver in a sealed box.
Submitted on Monday, February 04, 2008 8:46:07 PM

11. FFT (Fast-Fourier Transform):
A method by which a system is described using an impulse response. Both frequency and time data can be extracted, with room reflections removed, providing an extremely accurate analysis. Mathematical manipulation of the data is employed to view system parameters from a variety of perspectives.
Submitted on Friday, September 04, 2009 8:46:07 PM

12. Fidelity:-A term used to describe the accuracy of recording, reproduction, or general quality of audio processing. Getting it "high" is every designer's goal
Submitted on Sunday, November 30, 2008 8:46:07 PM

13. Filter-Any of various electric, electronic, acoustic, or optical devices used to reject signals, vibrations, or radiation of certain frequencies while passing others. Electronically, filters can be as simple as a single capacitor, or as complex as a dedicated computer circuit. For audio use the most common electronic filter is a bandpass filter, characterized by three parameters
Submitted on Thursday, July 23, 2009 8:46:07 PM

14. Filter:
An electrical circuit or mechanical device that removes or attenuates energy at certain frequencies. . An electrical circuit or mechanical device that removes or attenuates energy at certain frequencies. .
Submitted on Sunday, August 08, 2010 8:46:07 PM

15. Flat
A response that is relatively linear from the lowest to the highest audible frequencies. (e.g., Most installers will use an equalizer to get a flat response in cars.)
Submitted on Friday, April 23, 2010 8:46:07 PM

16. Flat
Definition:A response that is relatively linear from the lowest to the highest audible frequencies. (e.g., Most installers will use an equalizer to get a flat response in cars.)
Submitted on Monday, May 31, 2010 8:46:07 PM

17. Flat Response:
The faithful reproduction of an audio signal; specifically, the variations in output level of less than 1 dB above or below a median level over the audio spectrum.
Submitted on Monday, June 16, 2008 8:46:07 PM

18. Flat Response
An output signal in which fundamental frequencies and harmonics are in the same proportion as those of the input signal being amplified. A flat frequency response would exhibit relatively equal response to all fixed-point frequencies within a given spectrum.
Submitted on Friday, May 14, 2010 8:46:07 PM

19. Fletcher-Munson curve:-Our sensitivity to sound depends on its frequency and volume. Human ears are most sensitive to sounds in the midrange. At lower volume levels humans are less sensitive to sounds away from the midrange, bass and treble sounds "seem" reduced in intensity at lower listening levels.
Submitted on Friday, March 14, 2008 8:46:07 PM

20. Fletcher-Munson Curves:Fletcher and Munson were pioneering researchers who provided the basis of High Fidelity in the '30s. They accurately measured and published a set of plots showing the human's ear's sensitivity to loudness verses frequency. They conclusively demonstrated that human hearing acuity is essentially dependent upon loudness. The curves show the ear most sensitive to sounds in the 3 kHz to 4 kHz area. This means sounds above and below 3-4 kHz must be louder in order to be heard just as loud. For this reason, the Fletcher-Munson curves are referred to as "equal loudness contours." They represent a range of sensitivity from "barely heard," (0 dB SPL) all the way to "painfully loud" (120 dB SPL), usually plotted in 10 dB increments.
Submitted on Wednesday, June 11, 2008 8:46:07 PM

21. Flush (mounting):
Mounting a speaker in such a way that the speaker and its Grill do not protrude above the surrounding surface. Usually, this means mounting it at the back of the baffle board (the board the speaker is mounted on).
Submitted on Thursday, January 31, 2008 8:46:07 PM

22. Flux
Definition:The flow of magnetic energy in a circuit. Flux density is the measure of the strength of the magnetic field typicaly used in speakers, and which governs its power handling capacity.
Submitted on Thursday, February 18, 2010 8:46:07 PM

23. Former
The cylindrical portion of a speaker's voice coil section. A wire is wound around this cylinder to form a coil such that when current interacts with the magnetic field it produces a pumping motion that alternatively compresses and rarifies air, and creates the velocity for such air masses to reach our ears as sound.
Submitted on Friday, February 08, 2008 8:46:07 PM

24. Free Air Resonance-The natural resonant frequency of a driver when operating outside an enclosure.
Submitted on Saturday, March 21, 2009 8:46:07 PM

25. Free sound field-A sound field without acoustic boundaries or where the boundaries are so distant as to cause negligible reflections over the frequency range of audible sound. If the boundaries exist but completely absorb the sound then a virtual free field is created, thus anechoic chambers are used to accurately measure loudspeakers for their unique properties.
Submitted on Monday, September 21, 2009 8:46:07 PM

26. Free-Air Configuration:
This description usually indicates a speaker that, in the opinion of the manufacturer, is suitable for mounting in only a minimal enclosure, such as a baffle board that separates the back wave from the front.
Submitted on Tuesday, November 24, 2009 8:46:07 PM

27. Frequency:
1. The property or condition of occurring at frequent intervals. 2. Mathematics. Physics. The number of times a specified phenomenon occurs within a specified interval. In sound this simply refgers to the regular occurence of compression and rarification of air that we experience as sound.
Submitted on Friday, September 26, 2008 8:46:07 PM

28. Frequency:-Simply the number of events or cycles that occur in a time period, usually one second. Frequency is measured in Hertz (Hz), which are the number of cycles per second. (e.g., Humans can experience sound from 20 Hz to over 20,000 Hz.)
Submitted on Sunday, September 19, 2010 8:46:07 PM

29. Frequency-Simply the number of events or cycles that occur in a time period, usually one second. Frequency is measured in Hertz (Hz), which are the number of cycles per second. (e.g., Humans can experience sound from 20 Hz to over 20,000 Hz.)
Submitted on Friday, August 15, 2008 8:46:07 PM

30. Frequency-The range of human hearing is commonly given as 20-20,000Hz (20Hz-20kHz). One hertz (Hz) represents one cycle per second, 20Hz represents 20 cycles per second and so on. Lower numbers are lower frequencies
Submitted on Monday, August 31, 2009 8:46:07 PM

31. Frequency Modulation (FM)
In radio broadcasting, a method of modulation in which the frequency of the carrier voltage is varied with the frequency of the modulation voltage (Also see Amplitude Modulation).
Submitted on Saturday, May 16, 2009 8:46:07 PM

32. Frequency Response:
The range of frequencies that a speaker will reproduce (lowest frequency to the highest). While the optimal normal is 20 - 20,000 Hz (Hertz), the range of human hearing for individuals is often much more restricted. A good full-range speaker system however, will reproduce as much of this range as possible in order to cover all variations. Individual Drivers are limited to reproducing only that part of the spectrum for which they were made, so their response will be limited, but still a necessary point to consider when designing a complete sound system.
Submitted on Tuesday, June 23, 2009 8:46:07 PM

33. Frequency Response:How well a circuit or system transmits the frequencies that are applied to it. (e.g., The frequency response of my new amplifier was virtually flat from 20 Hz up to 20,000 Hz.)
Submitted on Monday, March 31, 2008 8:46:07 PM

34. Frequency Response:-How well a circuit or system transmits the frequencies that are applied to it. (e.g., The frequency response of my new amplifier was virtually flat from 20 Hz up to 20,000 Hz.)
Submitted on Saturday, February 27, 2010 8:46:07 PM

35. Fs:Fs or Free Air Resonance is the frequency at which a speaker naturally resonates, like a tuning fork. Sometimes known as ringing response.
Submitted on Saturday, January 02, 2010 8:46:07 PM

36. Fs:-The frequency of resonance for a driver in free air.
Submitted on Thursday, March 27, 2008 8:46:07 PM

37. Full Logic Deck
A cassette mechanism where the tape operations are carried out by logic circuit operated solenoids rather than soley mechanical methods.
Submitted on Friday, November 20, 2009 8:46:07 PM

38. Full Range:
Containing or able to handle all the frequencies normally experienced by us humans (from 20 Hz up to 20,000 Hz). (e.g., A full range speaker is one that was designed as the only speaker in a system.)
Submitted on Thursday, December 03, 2009 8:46:07 PM

39. Full Range:
Containing or able to handle all the frequencies normally experienced by us humans (from 20 Hz up to 20,000 Hz). (e.g., A full range speaker is one that was designed as the only speaker in a system.)
Submitted on Saturday, August 21, 2010 8:46:07 PM

40. Full-range
A speaker designed to reproduce all or most of the sound spectrum.
Submitted on Saturday, January 03, 2009 8:46:07 PM

41. Fundamental
The lowest frequency of a note in a complex wave form or chord.
Submitted on Tuesday, July 07, 2009 8:46:07 PM

42. Fuse:A simple device that limits the current flowing in a circuit and therefore protects the alternator, battery, electrical wiring, and the components. The current flow is disrupted when the fuse element melts and opens the circuit. (e.g., For safety, a component installer will always add a fuse very near the positive battery post.)
Submitted on Wednesday, September 09, 2009 8:46:07 PM

43. Fuse:A simple device that limits the current flowing in a circuit and therefore protects the alternator, battery, electrical wiring, and the components. The current flow is disrupted when the fuse element melts and opens the circuit. (e.g., For safety, a component installer will always add a fuse very near the positive battery post.)
Submitted on Saturday, July 12, 2008 8:46:07 PM

44. Fuse:A device designed to provide protection for a given circuit or device by physically opening the circuit. Fuses are rated by their amperage and are designed to blow or open when the current being drawn through it exceeds its design rating. They can be fast or slow acting, depending on type.
Submitted on Monday, July 05, 2010 8:46:07 PM

45. Fusible Link
Definition:Designed to perform the same task as a fuse, but the resembles a wire. Fusible links are commonly used in power transformers, ignition switches and other high current circuits.
Submitted on Friday, May 30, 2008 8:46:07 PM

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