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PPad | Pan_Pot | Parallel | Parallel | Parallel_Wiring | Parametric | Parametric | Parametric_Equalizer | Passive | Passive | Passive_Component | Passive_Crossover | Passive_Radiator | Passive_Radiator | PCM | Pe | Peak | Peak_Power_Handling_(MAX) | Peak_power_rating | Peak-to-Peak_power_rating | Period | Permalloy_Tape_Head | Phase | Phase | Phase | Phase_Cancellation | Phase_Coherence | Phase_Delay | Phase_Distortion | Phase_Linear | Phase_Shift | Phon | Piezo_(Tweeter) | Piezoelectric_Driver | Pink_Noise | Pitch | Planar_Source | Point-Source | Polar_response | Polarity | Polarity | Polarity | Pole_Piece | Polycarbonate | Polypropylene | Port | Port_Diameter | Port_Length | Ported | Ported | Ported_(enclosure) | Ported_Enclosure | Potentiometer | Power | Power_(P) | Power_amplifier | Power_amplifier | Power_factor | Power_Handling_(continuous_or_RMS) | Pre-Amp | Preamp_Output | Preamplifier | Preamplifier | Pre-amplifier | Precedence_Effect | Preset | Program_Bank | Program_Play | Proximity_Effect | Psychoacoustics | Punch | Push-pull | Push-Pull_Configuration |1. Pad: 2. Pan Pot-Short for panoramic potentiometer, this is a knob controlling a voltage divider that can send a signal to a combination of two busses, such as left and right. Always found on mixing consoles to set up (pan) a signal within the stereo field, it is also called a 'balance' control on domestic stereo amplifiers. 3. Parallel 4. Parallel-A circuit topology that connects multiple circuits to the same connectors. (e.g., We connected four 8 ohm woofers in parallel so that we could really load down our amplifier.) 5. Parallel Wiring:-A circuit in which two or more devices are connected to the same source of voltage, sharing a common positive and negative point, so that each device receives the full applied voltage. 6. Parametric:A type of equalizer that permits the center frequency, the filter shape, and the amplitude of each band to be varied. (e.g., You should save up for a good parametric equalizer so that you can dump your old 5 band graphic EQ.) 7. Parametric:A type of equalizer that permits the center frequency, the filter shape, and the amplitude of each band to be varied. (e.g., You should save up for a good parametric equalizer so that you can dump your old 5 band graphic EQ.) 8. Parametric Equalizer:-A multi-band equalizer enabeling control of at least three essential "parameters" of the internal bandpass filter sections. These parameters being 9. Passive:-The type of circuitry that does not require external power, but rather uses only basic circuit elements such as capacitors, inductors, and resistors. (e.g., We used two capacitors and one inductor to make a 6 dB/octave passive crossover for our midrange speakers.) 10. Passive require external power, but rather uses only basic circuit elements such as capacitors, inductors, and resistors. (e.g., We used two capacitors and one inductor to make a 6 dB/octave passive crossover for our midrange speakers.) 11. Passive Component:-In a crossover system, a non-powered component used to separate an audio signal into a specified frequency band before it goes to a particular amplifier or driver. A passive device usually incurs some loss (expressed in decibels) to a system. Typical such components include capacitors, coils, and resistors. 12. Passive Crossover 13. Passive Radiator: 14. Passive Radiator:-A device that looks just like an ordinary driver, except it has no magnet or voice coil. A passive radiator is usually a highly compliant device, with a similar cone material and surround found on regular active drivers. The radiator must usually be at least as large (or larger) than the driver it is aligned with. The passive radiator is tuned to Fb and used in place of a port. 15. PCM 16. Pe 17. Peak: 18. Peak Power Handling (MAX) 19. Peak power rating:-Another meaningless specification unless references are given.. 20. Peak-to-Peak power rating:See above. 21. Period: 22. Permalloy Tape Head 23. Phase:The relative timing of a sound wave that is measured in degrees from 0 to 360. 24. Phase-The time relationship between two AC (alternating current) signals. (e.g., In an AC circuit the current and voltage may experience a phase shift.) 25. Phase-The time relationship between two AC (alternating current) signals. (e.g., In an AC circuit the current and voltage may experience a phase shift.) 26. Phase Cancellation: 27. Phase Coherence: 28. Phase Delay:-A phase-shifted sine wave appears displaced in time from the input waveform. This displacement is called phase delay. 29. Phase Distortion-A type of audible distortion caused by time delay between various parts of the signal. 30. Phase Linear-Any audio system which accurately preserves phase relationships between frequencies, i.e., that exhibits pure delay. 31. Phase Shift 32. Phon 33. Piezo (Tweeter): 34. Piezoelectric Driver 35. Pink Noise-Pink noise is a random noise source characterized by a flat amplitude response per octave band of frequency, i.e., it has equal energy, or constant power, per octave. Pink noise is created by passing white noise through a filter having a 3 dB/octave roll-off rate. Due to this roll-off, pink noise sounds less bright and richer in low frequencies than white noise. Since pink noise has the same energy in each 1/3-octave band, it is the preferred sound source for many acoustical measurements in respect to the critical band concept of human hearing. The name comes from the filtering of white noise. White noise is analogous to white light in that it contains all audible frequencies distributed uniformly throughout the spectrum. Passing white light through a prism (a form of filter) breaks it down into a range of colors. Examination shows that red light is characterized by the longer wavelengths of light, i.e., light in the lower frequency region. Similarly, pink noise has higher energy in the low frequencies, hence the term, pink. 36. Pitch 37. Planar Source:Most electrostatics and magnetic planars have a large surface area. Think of a wide board dropped flat onto the water surface. The sound can be extremely coherent, but the listening window is effectively limited to being directly on-axis of both the left and right planar speaker. 38. Point-Source 39. Polar response 40. Polarity-The direction or polarization of a signal entering or leaving a component. For instance, if a positive signal is applied to the input of a device, and that device emits a positive signal, then it is said to be a non-inverting device. Polarity merely describes a direction and should not be confused with phase. (e.g., It is important to maintain similar polarity throughout an entire speaker system so that all the speakers will be working together.) 41. Polarity-A speaker, for example, has a positive and a negative input terminal. Connecting a battery directly to the speaker will result in the diaphragm moving outward. If you reverse the battery leads, the diaphragm will move inward. Caution 42. Polarity: 43. Pole Piece: 44. Polycarbonate-A polymer based plastic material offering superior resistance against resonance. 45. Polypropylene:A plastic based material used primarily for speaker cones due to its rigidity, damping and resistance against harsh environmental conditions. 46. Port:An opening, usually a tube, in an enclosure, through which sound is permitted to pass. 47. Port Diameter 48. Port Length 49. Ported:A type of bass reflex enclosure design that utilizes a hole, or port, to improve the low-frequency response. (e.g., In most cases a ported enclosure will thump harder than a sealed box, but not over as wide a range of frequencies.) 50. Ported 51. Ported (enclosure)-Any enclosure design with ports. In such designs the internal pressure wave is processed to be used either solely, or in conjunction with the woofer front wave in order to produce sound. A port can be a simple opening, a tube or a Passive Radiator. 52. Ported Enclosure 53. Potentiometer:A three-terminal variable resistor. Two terminals connect to the ends of a flat resistor, while the third terminal is attached to a moveable contact that interfaces with the resistive element. The moveable terminal, or slider, is capable of being positioned from one end of the element to the other. There are many physical types, with the rotary design being the most common, followed by linear slider used in graphic equalizers, for example. Often used as voltage dividers in electronic circuits, the input voltage is applied to the top of the resistive element, while the other end is tied to ground or a common reference and the output is taken from the slider. When the slider is positioned to the top extreme, the output equals the input less of course, the effect of the resistor, moving it to the bottom extreme gives an output of zero volts; and every possible level between is available as the slider is moved from one end to the other. The most commonly encountered application of this arrangement to control the volume of an audio device. In this way the electrical potential is varied, hence, a potentionmeter. The rate at which the voltage changes as the slider is moved is controlled by the taper of the pot. The taper defines the amount of resistive change as a function of travel. Several popular examples are listed below 54. Power:-a. The product of applied voltage (potential difference) and current in a direct-current circuit (or the voltage squared divided by the resistance, or the current squared times the resistance). b. The product of the effective values of the voltage and current with the cosine of the phase angle (between current and voltage) in an alternating-current circuit. c.Power The amount of energy (in joules) that a device delivers or consumes divided by the time (in seconds) that the device is operating. See 55. Power (P):-The time rate of doing work or the rate at which energy is used. One equation for Power 56. Power amplifier 57. Power amplifier 58. Power factor-The ratio of the total power in watts (resistive load) to the total apparent power in voltamperes (VA) (reactive load). The difference between watts and VA is due to reactive load impedance. Apparent power equals watts only for a purely resistive load (i.e., zero degrees phase shift between the applied voltage and the resultant current). Power factor is best thought of intuitively as the multiplier (ranging between 0 and 1) that you must use to obtain the real power from the apparent power. For example if the rms voltage and current of a circuit is measured and multiplied together, the apparent power is obtained, but this value must be multiplied by the power factor to obtain the real power. If the load is purely resistive then the phase difference between the voltage and current will be zero and the power factor will be one, and the apparent power will equal the true power -- but only for a resistive load. For a reactive load (any load with inductive and/or capacitive reactance, i.e., any real world load) there will be a phase difference between the voltage and the current due to the phase delay introduced by the reactive elements. Simply put, since the maximum voltage and current do not occur at the same instant of time the amount of power developed is less than the measured rms voltage and current multiplied together. 59. Power Handling (continuous or RMS):A rating of a Driver's ability in optimum conditions to handle a specified amount of audio power (electrical current power) on a constant basis, without damage. This is generally considered to be a conservative and reliable figure to use in judging what types of amplifier power will be most successful with a particular speaker design. 60. Pre-Amp-A circuit unit which takes a small signal and amplifies it sufficiently to be fed into the power amplifier for further amplification. A pre-amp includes all of the controls for regulating tone, volume, and channel balance.2 61. Preamp Output 62. Preamplifier 63. Preamplifier: 64. Pre-amplifier: 65. Precedence Effect 66. Preset:-A collection of system settings stored in a memory that is virtually instantly recallable, typically at the touch of a button. 67. Program Bank 68. Program Play:-A Custom File feature that allows the user to define a sequence of 12 tracks, in a specific order, for customized playback. Up to two banks of 12 track sequences can be recalled, for up to 24 tracks total. 69. Proximity Effect 70. Psychoacoustics-The scientific study of the relationship between human hearing and its stimulus; in other words, how we hear. 71. Punch:-Like "hitting hard," a subjective colloquial term that describes the snap or deep impact of the low end response of an audio system 72. Push-pull 73. Push-Pull Configuration |
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