【School】 speaker classification characteristics of weak..

<br> classification of many speakers in professional audio in common the following categories: <BR> <BR> 1. by using the occasion to point: professional speakers and home speakers are divided into two categories.. Home speakers are generally .used for home playback, the playback quality is characterized by soft, delicate, more refined appearance, aesthetics, the playback sound pressure level is not too high to bear relatively little power.. Professional speakers are generally used for dance halls, karaoke OK, theaters ., halls and stadiums, and other professional entertainment places.. Higher sensitivity of the general professional speaker, playback of high pressure, the intensity is good, under power, compared with home speakers, the sound quality more rigid, not very elegant appearance.. .However, professional speaker in the monitor speakers, and its performance is closer to home speakers, generally more refined appearance, small, so these monitors are often home HI-FI audio system used.. <BR> <BR> 2. Playback .frequency divided by: can be divided into full-band speakers, bass speakers and subwoofer.. The so-called full-band speaker is able to cover the bass, midrange and high frequency range audio playback.. Speaker of the lower limit frequency of .the whole band is generally 30Hz-60Hz, maximum frequency is 15KHz-20KHz.. In general only small sound system with a pair or two pairs of speakers can be fully responsible for the whole band playback tasks.. Bass speakers and subwoofer are generally used .to supplement full-band low-frequency speaker and a special ultra-low frequency playback speaker.. Such speakers typically used in large and medium-sized sound system for playback to enhance the strength and low sense of shock.. Use, mostly through an .electronic crossover (crossover) frequency, will be a dedicated low frequency signal into bass amp, and then push the bass or subwoofer.. <BR> <BR> 3. By use of points: the general playback can be divided into the .main speaker.. Monitor speakers and the back to listen to speakers.. The main speakers normally used for audio playback system, the main speaker, assume the primary playback tasks.. The performance of the main playback speaker sound system on the whole a great .influence on the playback quality, you can also use an all-band speakers plus subwoofer combination playback.. <BR> <BR> For the control room monitor speakers, studio monitor for programs to use, it has a distortion, wide and .flat frequency response, very few modifications and other characteristics of the signal, so the most can truly reproduce the original program. face.. Back to listening to speakers, also known as stage monitor speakers, generally used in the stage or dance hall monitor for .the actor or the band members sing or play their own sound.. This is because they are located on the stage behind the main speaker playback, you can not listen carefully to your sound or sound of the band playing, it can not find a good .match or not allowed to feel, seriously affecting the performance results.. Slant back to listening to speakers made general shape, on the ground, both on the stage so the stage will not affect the overall shape, but also in the playback time to listen .carefully to the people on stage, do not cause the sound to the microphone causing feedback. howling.. <BR> <BR> 4. According to sub-cabinet structure: can be divided into sealed enclosure, vented box, maze- .style speakers, acoustic tube speaker and multi-cavity resonant speakers.. One most frequently used in the professional speaker is vented box, which is characterized by wide frequency response, high efficiency, large sound pressure, in accordance with professional sound system speaker type, .but because of its less efficient, less so in the professional speakers in the. applications, mainly for home speakers, only a few monitors with closed box structure.. Sealed speaker design debug a simple, wide frequency response, low frequency and good transient characteristics ., but the sound of the dial unit are higher.. At present, the various speakers in vented box and sealed speaker occupied most of the ratio of the structure of other types of speakers many forms, but the proportion of very few.. < .BR> <BR> 1, closed enclosure (ClosedEnclosure) is the simplest structure, speaker system, and in 1923 provided by the FrederICk proposed by the speaker unit mounted on a fully sealed cabinets composition.. It will be the speaker before and after .the radiation acoustic radiation acoustic to the complete isolation, but the existence of the sealed box to increase the quality of the speaker resonance of the rigid motion, the speaker of the lowest resonance frequency increased.. Speaker of the sensual closed some deep, but the .bass good analytical, using ordinary hardware surround speakers, in order to get satisfactory bass reproduction, we need a large volume of large box, new speakers are mostly enclosed the appropriate selection of the high Q value. cis of the speakers.. Enclosed in a .box used in the elasticity of compressed air quality, although the speakers installed in the small box in the back of the air cone would impose anti-cone momentum, so this small closed enclosure, also known as Air Cushion Speaker ... <BR> .; <BR> 2, bass reflex enclosure (Bass-ReflexEnclosure), also known as vented box (AcoustICalPhaseInverter), 1930 by Thuras invention.. Load it has a loud mouth opening a panel in the cabinet, the opening position and shape of .a variety, but most are equipped with sound tube in the hole.. Contents of box plot the relationship between sound hole catheter, according hereby Resonance in a particular resonance frequency, said anti-resonance frequency.. Speaker after the catheter to the radiation acoustic .phase reversal, by the loud mouth of radiation to the front, and the speakers sound the same previous to the superposition of radiation, it provides wider bandwidth than the closed, with higher sensitivity, smaller. distortion.. Ideally, the low frequency limit playback .speaker resonance frequency lower than 20%.. This speaker cabinet can be re-released with a small, rich bass, is the most widely used type.. <BR> <BR> 3, acoustic impedance speaker (AcoustICresistanceEnclosure) is essentially .a vented box of deformation, which is filled with sound-absorbing materials or structures within the duct in the loud mouth, as a semi-closed box control phase reversal effect. so that buffer to reduce the anti-resonance frequency bass reproduction band broadening. .. <BR> <BR> 4, the transmission line speakers (LabyrinthEnclosure) is based on the classical theory of electrical transmission lines named, behind the speaker has made with the acoustic sound of the tube wall, and its length is required to .enhance the low-frequency sound wavelength .1 / 4 or 1 / 8.. Theory behind it to decay by a cone of sound waves, to prevent the reflection of the open end of the subwoofer sound radiation, but in fact the transmission line speaker .with mild damping and tuning function, increasing the resonance frequency of the speaker in the near or below. sound output and enhanced bass output at the same time reduce the stroke volume.. Usually the speaker's voice was a maze-like tube most of the stack ., it also called the labyrinth, or maze-type.. <BR> <BR> 5, passive radiation Speaker (DroneConeEnclosure) is a branch of the bass reflex enclosure, also known as an empty paper cone speaker, the United States .1954 published by Olson and Preston, and its opening out loud. mouth by a magnetic circuit and voice coil is not empty cone (passive cone) instead of, passive cone vibration of the radiation and forward radiation sound speakers work in the same phase state, .the use of cabinets and passive cone air support group. The composite pieces together smoothly and the sound quality of the formation of passive resonant cone, enhanced bass.. The main advantage of this speaker is silent reflection to avoid the sound hole because of the instability ., even if the volume can not get a good effect of sound radiation, so sensitive and can effectively reduce the degree of the speaker spoke of work, standing wave effects. small, clear and transparent sound.. <BR> <BR> .6, coupled cavity is between speaker and bass reflex closed between a box structure, the United States HenryLang published in 1953, its output is driven by the cone of the loud side of the hole. output, the other side of the cone is coupled with .a closed box.. The advantage of this low-frequency speaker when the speaker of the sharp increase of air-driven because of the coupling cavity is a tuning system, restricted movement in the cone, the loud mouth of the output of not more than .a single cone of the acoustic output, low frequency re-development of broad. put range, so the distortion reduction, increased power handling.. 1969 Japanese Lo-d of the River Island, Yukihiko published A · S · W (AcoustICSuperWoofer) is .a coupled cavity speaker enclosure, suitable for long stroke with a small diameter bass speaker playback without distortion.. <BR> <BR> 7, No. cylindrical speakers (HorntypeEnclosure) in terms of household type, the use of folded horn ( .FoldedHorn) form, it's horn trumpet in the mouth coupled with larger air load, drive end diameter is small,. The speaker on the back is sealed, the pressure chamber are more boxes in the back of the speaker cone.. To maintain the pressure .balance around the cone, phase reverse horn installed in the front speakers.. Folded horn speaker is derived vented box, the speakers sound better than closed the general bass reflex enclosure.. <BR>..