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Professional audio in the classification of speakers Daquan

There are many ways to classify the speakers, which are classified as follows in professional audio:

1. According to the use of occasions to points: divided into professional speakers and home speakers two categories. Home speakers are generally used for home playback, which is characterized by delicate sound soft and delicate, the appearance is more refined, beautiful, sound pressure level is not too high, relatively little power to bear. Professional speakers are generally used for dance halls, karaoke OK, theaters, halls and sports venues and other professional venues. General professional speaker of the higher sensitivity, sound pressure high pressure, good strength, to withstand power, compared with the home speaker, the sound quality is too hard, the appearance is not very delicate. But in the professional speaker monitor speakers, the performance and home speakers are closer, the appearance is generally more refined, compact, so this monitor speakers are often used by beats by dre cheap home HI-FI sound system used.

2. According to the playback frequency to points: can be divided into full-band speakers, subwoofer and subwoofer. The so-called full-band speaker is able to cover low frequency, intermediate frequency and high frequency range playback sound. The lower beats earbuds frequency of the full-band speaker is generally 30Hz-60Hz, the upper limit frequency is 15KHz-20KHz. In the general small and medium-sized sound system with only one or two pairs of full-band speakers can fully assume the playback task. Bass speakers and subwoofer are generally used to supplement the full-band speakers of low-frequency and ultra-low frequency playback of the special speakers. This type of speakers are generally used in large and medium-sized sound system, to enhance the intensity of low-frequency playback and shock. When used, most of the electronic divider (crossover) after the frequency, the low-frequency signal into a dedicated bass amplifier, and then promote the bass or subwoofer.

3. By use to points: generally can be divided into the main playback speaker, monitor speakers and listen to speakers and so on. The main playback speaker is generally used as the main speaker of the sound system, bear the main playback task. The performance of the main playback speaker on the sound quality of the sound system greatly affected, you can also use the whole band speaker plus subwoofer combination of playback.

Monitor the speaker for the control room, the recording studio for monitoring the use of the program, it has a small distortion, frequency wide and straight, very little modification of the characteristics of the signal, so the most cheap beats by dre true to reproduce the original appearance of the program. Back to listen to the speaker, also known as the stage monitor speakers, generally used in the stage or dance hall for the actors or band members to listen to their singing or playing voice. This is because they are located on the stage behind beats by dre the main speaker, can not listen to their own sound or the band playing sound, it can not be well with or not find the feeling, seriously affect the performance. The general back to listen to the speaker made of diagonal, on the ground, so that can not be on the stage will not affect the overall shape of the stage, but also in the playback when the people on stage to hear clearly, not to the sound back to the microphone caused by Whistle.

4. According to the box structure to points: can be divided into sealed speakers, inverted speakers, labyrinth speakers, sound tube speaker and multi-cavity resonant speakers and so on. Which is used in professional speakers is the most inverted speakers, which is characterized by wide frequency, high efficiency, sound pressure, in line with professional audio system speaker type, but because of its low efficiency, so less in the professional speakers Application, mainly for home speakers, only a small number of monitor speakers using closed box structure. The sealed speaker has the advantages of simple debugging, wide frequency response and low frequency transient characteristics, but the requirements of the loudspeaker unit are higher. At present, in a variety of speakers, inverted speakers and sealed speakers accounted for the majority of the proportion of other types of speakers in the form of a wide range of structures, but the proportion of very small.

1, closed speakers (ClosedEnclosure) is the most simple structure of the speaker system, 1923 proposed by FrederICk, by the speaker unit installed in a sealed box body. It can completely separate the forward and the radiated sound waves of the loudspeaker, but because of the presence of the closed box, the rigidity of the resonance of the loudspeaker is increased, and the lower resonant frequency of the loudspeaker is increased. The sound of the closed speakers is somewhat deep, but the bass is good. When using ordinary hard-ring speakers, in order to get a satisfactory bass replay, it is necessary to use a large-sized box with a large capacity. Compliant speaker. The use of closed air in the box of compressed air quality of the elastic effect, although the speaker installed in a smaller box, the cone behind the cone will be applied to the cone of the reaction force, so this small closed speakers also known as air-cushion speakers The

2, bass reflex (Bass-ReflexEnclosure) also known as inverted phase speakers (AcousticalPhaseInverter), 1930 by Thuras invention. In its load there is a mouth opening in the box on a panel, the hole location and shape of a variety, but most of the hole is also equipped with acoustic catheter. The inner volume of the box and the relationship between the acoustic guide hole, according to the resonance principle, in a particular frequency resonance, said anti-resonant frequency. The loudspeaker rearwardly radiated sound waves are inverted by the catheter and are radiated from the exit to the front, superimposed with the front acoustic wave of the loudspeaker, which provides a wider bandwidth than the closed, with a higher sensitivity, smaller distortion. Ideally, the lower limit of the low frequency playback frequency is 20% lower than the resonant frequency of the loudspeaker. This kind of speaker with a small box will be able to reproduce the rich bass, is currently the most widely used type.

3, Acoustics Resonator (AcousticorsistanceEnclosure) is essentially a kind of inverted-type speaker deformation, it is filled with sound-absorbing material or structure in the mouth of the catheter, as a semi-closed box control the role of inverted, so that the buffer to Reduce the anti-resonant frequency to broaden the bass playback frequency band.

4, transmission line speaker (LabyrinthEnclosure) is the classical electrical theory of the transmission line named after the speaker with a sound-absorbing wall made of acoustic tube, the length is required to enhance the low-frequency sound wavelength of 1/4 or 1 / 8. Theoretically it attenuates the sound waves from the cone behind the cone, prevents it from reflecting to the open end and affects the sound of the woofer, but in fact the transmission line speaker has a slight damping and tuning effect, increasing the speaker at or near the resonant frequency Sound output, and increase the amount of strokes while enhancing the bass output. Usually the sound tube of this speaker is mostly stacked by a labyrinth, so also known as labyrinth or curvature.

5, passive radiant speaker (DroneConeEnclosure) is a bass reflex speaker branch, also known as empty paper pot speaker, is the 1954 American Olson and Preston published, and its open mouth by a no magnetic circuit And the empty cone (passive cone) of the voice coil, the radiation generated by the passive cone vibration is in the same phase as the forward radiation of the loudspeaker, and the composite sound and the combination of the air and the passive cone support assembly Passive cone quality forms resonant and enhances bass. The main advantage of this speaker is to avoid the reflection of the sound hole produced by the unstable sound, even if the volume can not get a good sound radiation effect, so the high sensitivity, can effectively reduce the speaker work, Small, clear and transparent sound.

6, coupling cavity speaker is between the closed and bass reflex between a box structure, in 1953 the United States HenryLang published, its output by the cone side of the drive out of the hole output, cone the other side Coupled with a closed box. The advantages of this speaker is the low frequency of the speaker to promote the amount of air greatly increased, because the coupling cavity is a tuning system, in the cone movement is limited, the output output does not exceed the individual cone cone output, broaden the low frequency Put the range, so the distortion is reduced, to withstand power increases. In 1969 the Japanese Lo-d River Island published by the A & middot; S & middot; W (AcousticsuperWoofer) speaker is a coupling cavity speaker, suitable for small-caliber long-stroke speakers without distortion to reproduce the bass.

7, the trumpet speaker (HorntypeEnclosure) for the home type, the use of folding trumpet (FoldedHorn) form, its trumpet trumpet in the mouth with the larger air load coupling, the drive end diameter is very small, the back of this speaker is Sealed, the pressure inside the chamber are more on the back of the speaker cone. For the cone before and after the pressure to maintain a balance, inverted tube installed in front of the speaker. Folding horn speaker is derived from the inverted speaker, the sound effect is better than the general bass loudspeaker speakers.