|
|||||||||||
SSACD_(Super_Audio_Compact_Disc) | Satellite | Satellite_Radio | Scan | Scan | Scan_tuning | Screw_Type_(terminal) | Sd | Sd_(a_Theile_Small_parameter) | Sealed_(enclosure) | Sealed_enclosure | Sealed_enclosure | Sealed_enclosure | Search | Search | Second-Order | Seek | Seek | Selectivity | Sensitivity | Sensitivity | Sensitivity | Sensitivity_(Efficiency) | Separates_or_Matched_Components | Short_Circuit | Shuffle_Play | Sibilance | Signal_processors | Signal_To_Noise_Ratio | Signal-to-noise_(SN)_Ratio | Silk_Dome_(tweeters) | Sine_Wave | Sine_wave | Sine_Wave | Single-ended | Skip | Skip | Slew_Rate | Slope | Slope | Slope | Sound | Sound_Discriminator | Sound_Field | Sound_Power | Sound_Pressure_Level_(Spl) | Sound_Pressure_Level_(SPL) | Sound_Shaping | Sound_Waves | Sound_Waves | Soundstage | Soundstage | Soundstage | Soundstage | Soundstage | Source_Impedance | Speaker_Level | Speaker_Sensitivity | Spectral_balance | Spider | Spider | SPL | SPL | Staging | Stamped_(Basket) | Standing_Wave | Standing_wave | Stereo | Stiffening_Capacitor | Stiffening_Capacitor | Streaming | Stroke | Studio_Monitors | Subwoofer | Subwoofer_Preamp_Outputs | Super_Tweeter | Supraaural | Surface_(mounting) | Surround | Surround_(suspension) | Surround_Sound | Sweet_Spot |1. SACD (Super Audio Compact Disc)-SACD is one of two main emerging new standards for high-resolution audio on compact discs. The other is DVD-Audio. It was developed by Sony and is based on a licensed technology called Direct Stream Digital, which was developed by Sony and Phillips and is theoretically capable of sample rates up to 2.8 MHz. The SACD format allows for playback of multi-channel audio and a bandwidth of 100 kHz at over 120 dB dynamic range while retaining compatibility with existing compact disc technology. There are several subformats in the works (single layer, dual layer, etc.) that are optimized for different tasks, but Sony claims that all SACD discs have fully uncompromised audio quality. That is, no data compression, and no computer generated surround mixes from stereo data or vice versa. The potential success of this format in the mainstream is currently under scrutiny amidst other developments such as DVD Audio, but there are a number of titles available on the Sony label with promised support from other record labels. 2. Satellite:A satellite speaker is usually fairly small, and does not reproduce the lowest frequencies. Usually meant to be used with a woofer or subwoofer. 3. Satellite Radio: 4. Scan:When a tuner stops at each programmed station for about five seconds to give the listener a chance to select that station. (e.g., John's old AM/FM/Cassette player doesn't even have a scan feature so he has to tune all his stations one at a time.) 5. Scan: 6. Scan tuning 7. Screw Type (terminal) 8. Sd: 9. Sd (a Theile Small parameter): 10. Sealed (enclosure):-Sometimes known as an Acoustic suspension type, the sealed enclosure is a simple design in which each woofer is mounted in a sealed, airtight box or compartment with a specific internal volume for precisely the woofer being used. The air contained within the box or compartment then acts as a spring that allows more control over the speaker's behavior. Great care must be taken in design, as too small a box will sound "boomy," while too large a box may have hardly any bass at all. This should be remembered when replacing a woofer in such an enclosure. Best results can be expected when using woofers with a QTS between .30 to .90. These speakers offer good control, low Distortion and high power handling. 11. Sealed enclosure 12. Sealed enclosure 13. Sealed enclosure 14. Search 15. Search-A fast forward or fast reverse feature of both cassettes and CDs that permit the listener to find a particular passage. (e.g., Using music search lets me move quickly up to the right part of the song.) 16. Second-Order:The frequency attenuation that occurs at a rate of 12 dB per octave. 17. Seek 18. Seek-When a tuner stops at each strong station. (e.g., I only use seek tuning when I'm in a new area and don't know the stations.) 19. Selectivity 20. Sensitivity: 21. Sensitivity 22. Sensitivity:The control on a component that adjusts the gain of an electronic circuit. (e.g., Most power amplifiers will produce minimum hiss when the sensitivity control is set to its minimum.) 23. Sensitivity (Efficiency): 24. Separates or Matched Components:-A typical separates system includes a separate woofer, tweeter, and external Crossover, all of which are designed to work smoothly with one another. Generally, these components are made of better materials than two-and three-way Drivers. Separate woofers may be easier to mount in tight places because tweeter protrusion is not a factor. Separate tweeters allow positioning for optimum imaging. Given adequate power, separates can deliver excellent dynamics and detail. Separates are often a superior speaker design choice for many installations. 25. Short Circuit:-The condition that occurs when a circuit path is created between the positive and negative poles of a battery, power supply, or circuit. A short circuit will bypass any resistance such as working componenets in a circuit, and cause it not to operate. 26. Shuffle Play 27. Sibilance 28. Signal processors 29. Signal To Noise Ratio:-A measurement of noise level in a device compared to the level of the signal. Higher numbers signify a greater difference, which is better. In technical terms, it is the ratio, expressed in dB, of signal power at a reference point in a circuit, to the noise information that would exist if the signal were removed (the noise floor). The maximum signal to noise ratio (equivalent to dynamic range) of a given piece of equipment can be seen as a measure of functional fidelity. This ratio is how much absolute noise it produces, compared to the highest signal voltage it can pass without distortion. 30. Signal-to-noise (SN) Ratio:-The range or distance between the noise floor (the noise level of the equipment itself) and the music signal. 31. Silk Dome (tweeters)-Dome tweeters in which the dome is composed of a treated soft silk like material. This is a design that is much less susceptible to mechanical deformation, and yet yields a fairly smooth response over the extent of its range. 32. Sine Wave:A waveform that is commonly used to test and set up audio systems. (e.g., We checked out our subwoofer enclosure by sending it a 50 Hz sine wave and measuring the response.) 33. Sine wave 34. Sine Wave-A waveform that is commonly used to test and set up audio systems. (e.g., We checked out our subwoofer enclosure by sending it a 50 Hz sine wave and measuring the response.) 35. Single-ended:-Type of amplification often, (but not always), using vacuum tubes. Typically low power output, low damping factor and relatively high distortion. Single-ended enthusiasts claim that the sound quality is more "real". 36. Skip-When a CD player quickly advances up to the start of the track. (e.g., I like the skip feature when I get a new CD and want to check it out fast.) 37. Skip:-When a CD player quickly advances up to the start of the track. (e.g., I like the skip feature when I get a new CD and want to check it out fast.) 38. Slew Rate:Slew rate measures the ability of a piece of audio equipment to accurately reproduce fast changes in amplitude. Measured in volts per microsecond, this spec is most commonly associated with amplifiers, but can bet applied to most types of equipment. In amplifiers, a low slew rate softens the definition of a signal, blurring transients and sounding "mushy." Slew rate is most critical in high frequencies reproduction where rapid changes in amplitude are most pronounced. An amplifier with a higher slew rate is often subjectively rated as tighter and more dynamic. 39. Slope:The rate of rise or fall of a filter, usually expressed in a number of dB per octave. (e.g., John's crossover had a 12 dB/octave slope on high output and a 18 dB/octave slope on the low output.) 40. Slope:-The rate of change that a frequency response curve displays, normally stated in dB per Octave. Among other things, Slope can relate to Roll Off rates in Crossover action, low-end roll off and roll on rates and other forms of increasing or decreasing response. 41. Slope:-The rate of rise or fall of a filter, usually expressed in a number of dB per octave. (e.g., John's crossover had a 12 dB/octave slope on high output and a 18 dB/octave slope on the low output.) 42. Sound 43. Sound Discriminator 44. Sound Field:-The totality of the sound presented by the audio system. This includes the sound as it was recorded, mixed, transported, reproduced, and finally heard by the listener. 45. Sound Power: 46. Sound Pressure Level (Spl) 47. Sound Pressure Level (SPL):-An acoustic measurement of sound energy. 1 dB SPL is the smallest increment in sound level to which the average human is sensitive. Theoretically, 0 dB SPL is the threshold of human hearing while approximately 120 dB is the threshold of pain. 48. Sound Shaping: 49. Sound Waves 50. Sound Waves 51. Soundstage:The position (front/back and high/low) that music or sound appears to be originating from, as well as the apparent depth of the stage. A car with speakers only in the front will likely have a forward soundstage, but may not have enough rear fill to make the music seem live. A car with both front and rear speakers may have anything from a forward to a rear soundstage, with an accompanying fill from the softer drivers depending on the relative power levels and the frequencies reproduced. The high/low position of the soundstage is generally only obvious in a car with a distinctly forward soundstage. The music may seem to be originating in the footwells, the dash, or out on the hood, depending on the car's design. 52. Soundstage:-Individual vocal and instrumental "images" make up your stereo system's soundstage. The degree to which particular sounds can be localized in space is an index to the quality of the imaging. The better the soundstage, the greater the sense of its definite width, depth and height. (See also Imaging above) 53. Soundstage 54. Soundstage: 55. Soundstage:-The psychoacoustic effect that takes place when two or more channels of program material acoustically interact with our human brains. (e.g., By paying attention to the left and right path lengths of the front speakers, Sandy found that her front soundstage improved tremendously.) 56. Source Impedance 57. Speaker Level 58. Speaker Sensitivity-measured in dB, is how loud a speaker plays with a given amount of power going into it. Conveniently, the usual measuring stick is 1 Watt at 1 meter. A higher sensitivity rating means that the speaker will play louder using the same power as a speaker with a lower rating. So, should you always buy the speaker with the higher sensitivity rating? Not necessarily, because you'll usually end up trading off some other aspect of system performance like bass response or power handling. Sometimes a lower sensitivity rating gives a speaker a better (flatter) frequency response. How you announce your intention to spend your paycheck building a car audio system is your sensitivity rating. 59. Spectral balance 60. Spider:The rear suspension element on the cone of a loudspeaker. All the moving parts of the speaker are suspended by the spider in the rear and the Surround in the front. The spider is so named because of its resemblance to an arachnid, especially in the way in which flexion is obtained in the design of the concentric pleats that allow back and forth motion. (SeeSurround) 61. Spider:-The flexible material that supports the former, voice coil, and inside portion of the cone within the speaker frame. 62. SPL: 63. SPL:A measured value of the pressure of sound expressed in dB. (e.g., After installing four 12-inch woofers and 200 watts more power, Jack's system cranked out a very respectable 124 dB SPL.) 64. Staging 65. Stamped (Basket):-The frame of a loudspeaker which has been stamp pressed to achieve its shape. It is used as a base to mount all the other elements of the driver. With a frame of adequate thickness and strength, this arrangement should perform well for the life of the speaker. (See Cast Frame,) 66. Standing Wave:A phenomenon where a sound is reflected between two parallel surfaces, such that certain sounds are made more intense and others diminished in given parts of a listening environment. Technically they are created by room modes, which are modes of vibration of air in the room. The sound waves interfere with one another to produce a series of places where the sound pressure level (SPL) at some frequencies is high, and another series of places where they are low. The places are sometimes called peaks and nodes. A standing wave exists in a room where a frequency is such that the distance between any two surfaces is equal to one half of its wavelength. For a given distance there will be many frequencies that will generate standing waves, each a multiple of the fundamental frequency whose wavelength is related to the dimension in question. Standing waves are always detrimental to the acoustics of a room, but can be avoided by careful room design, or minimized by absorbing certain frequencies where they build up, which is usually along walls or in corners. 67. Standing wave:-A buildup of sound level at a particular frequency that is dependent upon the dimensions of a resonant room, car interior, or enclosure. It occurs when the rate of energy loss equals the rate of energy input into the system. This is what you hear when you listen into a sea shell. 68. Stereo-From the Greek meaning solid. The purpose of stereo is not to give you separate right and left channels, but to provide the illusion of a three-dimensional, holographic image between the speakers. 69. Stiffening Capacitor: 70. Stiffening Capacitor 71. Streaming-A technique for transferring data such that it can be processed as a steady and continuous stream. Streaming technologies are often used on the Internet because many users do not have fast enough access to download large multimedia files quickly, so the client browser or plug-in can start displaying the data before the entire file has been transmitted. 72. Stroke: 73. Studio Monitors:-Speakers used in recording studios for playback and mixing of source recordings. While these are commonly thought of as extremely highly developed speakers, it is often true that some home oriented speakers may offer better performance. The term 'monitor' has become not so much a technical description, as an advertising ploy to sell expensive speakers. View such claims with skepticism. Favor a more analytical approach to an individual speaker's performance. 74. Subwoofer 75. Subwoofer Preamp Outputs 76. Super Tweeter 77. Supraaural 78. Surface (mounting):-A method of mounting speakers in which the external parts of the upper speaker protrude above the surface on which it is mounted. 79. Surround-The surround is the flexible ring around the edge of the speaker cone. In conjunction with the inner suspension element called a Spider, it determines the overall impedance of the speaker. Pleated, treated cloth surrounds are usually stiffer and less compliant than their foam and rubber rolled edge cousins. A flexible suspension system in the speaker usually indicates greater efficiency. For some units, it is desirable to have suspensions that are pliable enough to let the woofer cone travel freely in and out. A technical specification for this characteristic in more expensive speakers, is XMS. The further the cone can travel and the more compliant it is, the stronger the bass can be in enclosures that take advantage of it. However, certain types of very good enclosures require a more limited, stiffer cone movement to develop their more controlled and High Fidelity response. Surrounds are usually made of cloth, foam or rubber. Rubber tends to last longest. 80. Surround (suspension):The outer suspension of a speaker cone; holds the diaphragm in place but allows it to move when activated. Usually made of foam or rubber. 81. Surround Sound:-Sound extracted from the stereo signal sent to smaller rear or side speakers used in a home theater. 82. Sweet Spot-The so-called "best" listening position in which the sound field is overlapped by the most direct radiations from all the speakers, and imaging is most convincingly achieved. |
|
||||||||||
| Copyright © 2005-2012 All Car Stereos and Speaker sets! All rights reserved. Sunday, February 05, 2012 9:43:15 PM - 26 Users Online Home | Brands | Vehicles | Contact Us | Site Map | Links| Custom Wheels | Wheels and Rims | Centercaps | Exhaust Content Management by WebBuzz Inc |
|||||||||||
