S SACD_(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)
Definition: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.
Submitted on Saturday, May 21, 2005 4:00:25 PM 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.
Submitted on Wednesday, June 20, 2007 4:00:25 PM 3. Satellite Radio
Digital radio transmission system that utilizes satellites in space to broadcast directly to ground based and mobile receivers. Two existing networks, Sirius and XM offer hundreds of channels of diverse offerings for a subscription fee. Separate standards govern the reception of each, so a choice must be made prior to aquiring the system.
Submitted on Wednesday, April 20, 2005 4:00:25 PM 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.)
Submitted on Monday, July 18, 2005 4:00:25 PM 5. 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.)
Submitted on Tuesday, March 08, 2005 4:00:25 PM 6. Scan tuning:In FM receivers, Preset Scan automatically plays a brief sample of what's on each of the preset stations. Station Scan samples each strong station regardless of whether it has been preset. Seek tuning moves to the next strong station and stops there — the "Seek" button must be manually initiated again to repeat the process.
Submitted on Monday, May 28, 2007 4:00:25 PM 7. Screw Type (terminal)-The most secure method of interconnecting the wire from the amplifier to a speaker. In its best realization, the terminal has a post with a hole drilled through it at the base, through which the incoming conductor is placed. A cap is then screwed down from the top of the terminal, compressing the wire below.
Submitted on Tuesday, May 17, 2005 4:00:25 PM 8. Sd
Definition:The effective piston area of a driver. The effective piston area of a driver.
Submitted on Tuesday, March 20, 2007 4:00:25 PM 9. Sd (a Theile Small parameter)
Definition:Effective piston radiating area of a subwoofer driver in square meters.
Submitted on Friday, December 29, 2006 4:00:25 PM 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.
Submitted on Saturday, March 03, 2007 4:00:25 PM 11. Sealed enclosure:-An air tight enclosure that completely isolates the back wave of the driver from the front. Very tight, defined sound (with Qtc = 0.707) with very good transient response and power handling.
Submitted on Tuesday, January 03, 2006 4:00:25 PM 12. Sealed enclosure
Definition:The type of woofer box that separates the back wave from the front wave and still contains the back wave within the box. (e.g., You should use a sealed enclosure only if your woofer was designed for that type of box.)
Submitted on Thursday, March 31, 2005 4:00:25 PM 13. Sealed enclosure:
The type of woofer box that separates the back wave from the front wave and still contains the back wave within the box. (e.g., You should use a sealed enclosure only if your woofer was designed for that type of box.)
Submitted on Tuesday, November 22, 2005 4:00:25 PM 14. 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.)
Submitted on Friday, December 08, 2006 4:00:25 PM 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.)
Submitted on Wednesday, August 23, 2006 4:00:25 PM 16. Second-Order
The frequency attenuation that occurs at a rate of 12 dB per octave.
Submitted on Saturday, September 30, 2006 4:00:25 PM 17. 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.)
Submitted on Friday, July 13, 2007 4:00:25 PM 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.)
Submitted on Wednesday, September 13, 2006 4:00:25 PM 19. Selectivity
Definition:Tuner specification which defines the tuner's ability to reject adjacent station interference.
Submitted on Wednesday, April 11, 2007 4:00:25 PM 20. 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.)
Submitted on Monday, July 09, 2007 4:00:25 PM 21. Sensitivity:-A measurement of how much power is required for a loudspeaker to achieve a certain output level. The general standard used is on-axis SPL (Sound Pressure Level) at 1 watt input, 1 meter distance.
Submitted on Tuesday, February 27, 2007 4:00:25 PM 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.)
Submitted on Monday, June 19, 2006 4:00:25 PM 23. Sensitivity (Efficiency)-The rating of a loudspeaker that indicates the level of a sound intensity that the speaker produces (in dB) at a distance of one meter when it receives one watt of input power.The Efficiency or Sensitivity rating indicates how effectively a speaker converts electrical power from the amplifier into sound pressure. This is frequently related to larger magnet sizes, larger voice coil diameters, and more compliant suspensions. Optimized enclosures are essential in achieving maximum sensitivity, overall. The higher the Decibel number, the more efficient the speaker and the louder it will play with the same input power. While usually more expensive, an efficient speaker helps maximize the potential of the available power.
Submitted on Wednesday, March 07, 2007 4:00:25 PM 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.
Submitted on Wednesday, July 20, 2005 4:00:25 PM 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.
Submitted on Saturday, January 21, 2006 4:00:25 PM 26. Shuffle Play:-A feature which employs random selection from available tracks.
Submitted on Sunday, March 26, 2006 4:00:25 PM 27. Sibilance:-High frequency complex sounds in speech, such as "S", "F" & "T".
Submitted on Wednesday, January 26, 2005 4:00:25 PM 28. Signal processors
Definition:Electronic devices which alter sound either to achieve a particular effect or to solve a problem with that sound (e.g. delays, compressors, reverbs, noise gates, equalizers).
Submitted on Friday, January 19, 2007 4:00:25 PM 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.
Submitted on Wednesday, December 15, 2004 4:00:25 PM 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.
Submitted on Friday, December 30, 2005 4:00:25 PM 31. :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.
Submitted on Wednesday, September 14, 2005 4:00:25 PM 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.)
Submitted on Sunday, January 30, 2005 4:00:25 PM 33. Sine wave:-The waveform of a pure alternating current or voltage. It deviates about a zero point to a positive value and a negative value. Audio signals are sine waves or combinations of sine waves. The waveform of a pure alternating current or voltage. It deviates about a zero point to a positive value and a negative value. Audio signals are sine waves or combinations of sine waves.
Submitted on Saturday, August 05, 2006 4:00:25 PM 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.)
Submitted on Thursday, October 06, 2005 4:00:25 PM 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".
Submitted on Thursday, August 11, 2005 4:00:25 PM 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.)
Submitted on Tuesday, August 01, 2006 4:00:25 PM 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.)
Submitted on Wednesday, June 29, 2005 4:00:25 PM 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.
Submitted on Tuesday, July 12, 2005 4:00:25 PM 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.)
Submitted on Thursday, March 30, 2006 4:00:25 PM 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.
Submitted on Thursday, May 10, 2007 4:00:25 PM 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.)
Submitted on Sunday, February 13, 2005 4:00:25 PM 42. Sound:-A type of physical kinetic energy called acoustical energy that falls within the portion of the spectrum to which humans are sensitive.
Submitted on Monday, April 18, 2005 4:00:25 PM 43. Sound Discriminator:-A device designed to evaluate, and discriminate between the sounds that may be heard within the interior of a vehicle, and then trigger the security system should the sound fit within the parameters of what the sensor is designed to react.
Submitted on Thursday, November 16, 2006 4:00:25 PM 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.
Submitted on Saturday, February 11, 2006 4:00:25 PM 45. Sound Power-The total amount of acoustical energy produced by a sound source and measured in Joules per second. The degree to which this measurement is constant( or linear)with respect to frequency, is an index of the overall fidelity of the system.
Submitted on Wednesday, October 04, 2006 4:00:25 PM 46. Sound Pressure Level (Spl)-Given in decibels (DB) is an expression of loudness or volume. A 10db increase in SPL represents a doubling in volume. Live orchestral music reaches brief peaks in the 105db range and live rock easily goes over 120db.
Submitted on Saturday, January 22, 2005 4:00:25 PM 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.
Submitted on Thursday, July 05, 2007 4:00:25 PM 48. Sound Shaping
Definition:A sophisticated cicuit that defines the parameters of the sonic experience with a blending of directional and tonal adjustments to acheive both realistic and synthetic effects.
Submitted on Monday, November 20, 2006 4:00:25 PM 49. Sound Waves-Sound waves can be thought of like the waves in water. Frequency determines the length of the waves; amplitude or volume determines the height of the waves. At 20Hz, the wavelength is 56 feet long! These long waves give bass its penetrating ability, (why you can hear car boomers blocks away).
Submitted on Sunday, October 30, 2005 4:00:25 PM 50. Sound Waves:Fluctuating waves of barometric pressure that travel through a physical medium such as air. An acoustic wave consists of a traveling vibration of alternate compressions and rarefactions, whereby sound is transmitted through air or other media.
Submitted on Thursday, December 30, 2004 4:00:25 PM 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.
Submitted on Thursday, November 04, 2004 4:00:25 PM 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)
Submitted on Tuesday, October 25, 2005 4:00:25 PM 53. Soundstage-A listening term the refers to the placement of a stereo image in a fashion that replicates the original performance. A realistic soundstage has proportional width, depth and height.
Submitted on Wednesday, June 20, 2007 4:00:25 PM 54. Soundstage
Definition: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.)
Submitted on Wednesday, July 04, 2007 4:00:25 PM 55. Soundstage
Definition: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.)
Submitted on Thursday, June 23, 2005 4:00:25 PM 56. Source Impedance:A parameter of an audio component referring to the output impedance. A low output impedence .5 to 4 ohms, is preferred for automotive applications.
Submitted on Friday, August 04, 2006 4:00:25 PM 57. Speaker Level:Taken from the speaker terminals. This signal has already been amplified.
Submitted on Sunday, February 04, 2007 4:00:25 PM 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.
Submitted on Monday, April 09, 2007 4:00:25 PM 59. Spectral balance-Balance across the entire frequency spectrum of the audio range.
Submitted on Thursday, February 09, 2006 4:00:25 PM 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)
Submitted on Saturday, May 07, 2005 4:00:25 PM 61. Spider:The flexible material that supports the former, voice coil, and inside portion of the cone within the speaker frame.
Submitted on Thursday, December 29, 2005 4:00:25 PM 62. 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.)
Submitted on Saturday, January 13, 2007 4:00:25 PM 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.)
Submitted on Friday, September 29, 2006 4:00:25 PM 64. Staging:-like "imaging," is a description of your system's ability to "fool you" into thinking that everything (including bass) is right in front of you. Like on a stage (hence the term "staging"), the singer should (in general) be in the center, and the band should be located to the left and right. Good staging (and good imaging) are not easy to achieve in a car audio situation. One of the hardest aspects of staging is getting the illusion that the bass is coming from the front of the car, even though the woofers are in the back. You may have to experiment with speaker locations, directions, and crossover roll-off points. Cheat the bass by overlapping the frequencies played by your mids and subs so that your semi-directional mids actually "pull" the bass to the front. To do this, use a high-pass crossover to roll off your midbass drivers as low as you can (without getting distortion). Then set your sub's low-pass crossovers at a slightly higher frequency. (See More About Crossovers) This will mix the bass coming from the front and rear, giving the illusion that the bass comes from the front. Adding a center channel improves staging as well, but that's next week's lesson.
Submitted on Monday, February 13, 2006 4:00:25 PM 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,)
Submitted on Sunday, November 21, 2004 4:00:25 PM 66. Standing Wave
Definition: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.
Submitted on Friday, October 20, 2006 4:00:25 PM 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.
Submitted on Friday, August 25, 2006 4:00:25 PM 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.
Submitted on Wednesday, November 17, 2004 4:00:25 PM 69. Stiffening Capacitor
This term refers to a large value electrolytic capacitor that is used to improve the peak power handling capacity of a car audio system using amplifiers with switching power supplies. (e.g., The reason that we installed 2 farads of Stiffening Capacitors was so that we could stop our headlights from dimming whenever the bass hit hard.) *This is a registered trademark of Autosound 2000, Inc.
Submitted on Thursday, July 13, 2006 4:00:25 PM 70. Stiffening Capacitor:
This term refers to a large value electrolytic capacitor that is used to improve the peak power handling capacity of a car audio system using amplifiers with switching power supplies. (e.g., The reason that we installed 2 farads of Stiffening Capacitors was so that we could stop our headlights from dimming whenever the bass hit hard.) *This is a registered trademark of Autosound 2000, Inc
Submitted on Saturday, January 07, 2006 4:00:25 PM 71. Streaming
Definition: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.
Submitted on Sunday, June 17, 2007 4:00:25 PM 72. Stroke
The distance that the speaker cone or voice coil can travel in both directions.
Submitted on Monday, October 31, 2005 4:00:25 PM 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.
Submitted on Wednesday, August 10, 2005 4:00:25 PM 74. Subwoofer:A speaker designed exclusively for low-frequency reproduction. A true subwoofer should be able to at least reach into the bottom octave (20-40Hz). There are many "subwoofers" on the market that would be more accurately termed "woofers".
Submitted on Thursday, October 13, 2005 4:00:25 PM 75. Subwoofer Preamp Outputs:Individual number of RCA outputs that are coupled with a built-in low-pass crossover for connection to a dedicated subwoofer amplifier.
Submitted on Monday, May 09, 2005 4:00:25 PM 76. :A Driver constructed to reproduce the highest possible frequencies from roughly 13 kHz to 25 kHz. While most standard Tweeters can do an excellent job right up to 16 or 20 kHz, these units deliver the most extreme parts of the upper range for those fortunate (or not) few who can actually hear them.
Submitted on Wednesday, May 02, 2007 4:00:25 PM 77. Supraaural:Term used in reference to headphones. Supraaural phones rest on the ear, rather than enclosing the ear. Supraaural phones typically are lightweight, and because they do not seal around the ear, tend to not provide good isolation, but permit the listener a higher degree of awareness of external sounds.
Submitted on Sunday, March 27, 2005 4:00:25 PM 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.
Submitted on Wednesday, July 20, 2005 4:00:25 PM 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.
Submitted on Monday, April 04, 2005 4:00:25 PM 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.
Submitted on Friday, May 13, 2005 4:00:25 PM 81. Surround Sound
Definition:Sound extracted from the stereo signal sent to smaller rear or side speakers used in a home theater.
Submitted on Thursday, November 16, 2006 4:00:25 PM 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.
Submitted on Monday, April 25, 2005 4:00:25 PM
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