【 Weak current College 】 common classification features speakers

Speakers of many classification methods, common in professional audio as follows:

1. use the occasion to share: divided into professional speakers and home speakers. Home speakers generally used family playback, it features playback sound quality and smooth soft appearance more exquisite, beautiful, playback sound pressure level is not too high, the bear with a relatively small amount of power. Professional speakers generally used to dance halls, karaoke, theaters, halls and stadiums and other professional and recreational sites. General professional sound sensitivity is high, the playback sound pressure is high, the intensity of the good bear power, and household compared to its quality sound too hard, but also not very elegant appearance. But in professional speakers in za, its performance and home speakers more close, general appearance and exquisite, small, so this class za also often been home HI-FI sound system.

2. press the playback frequency: can be divided into full-band speakers, bass speakers and subwoofer. The so-called full-band sound box refers to cover low frequency, the frequency range of audio playback. All the lower frequency bands speakers generally 30Hz-60Hz, ceiling at 15KHz-20KHz. In General, small and medium-sized audio system with only one or two full bands to fully assume the playback sound. Bass speakers and subwoofer is commonly used to add full-band low-frequency and low frequency sound playback of dedicated speaker. The speaker generally used in large and medium-sized audio system to enhance the low frequency playback and shock. When used, mostly through an electronic divider (divide the damper) frequency, low frequency signal into a dedicated Bass Amplifier, and promote the bass or subwoofer.

3. Press uses to points: generally can be classified as primary playback speaker. za and back to listen to speakers, etc. Main playback speaker generally used as a main speaker sound system, assume the main playback tasks. Main playback sound performance for the entire sound system's playback quality impact is very large, or you can choose the whole band speakers with subwoofer combination play.

Za for control room, Studio for program monitoring, it has low distortion, wide and flat frequency response, signal very little modification, and other characteristics, therefore most faithfully reproduce the program back to its original state. Back to listen to the speaker also referred to as stage monitor speaker, generally used on the stage or dancing for the actors or members of the band listens to his singing or playing a sound. This is because they are located on the back of the main playback sound box, you cannot hear their own voice or sound of the band's performance, it is not a good fit or find no feeling, severely affect performance. Return to hear speakers into General, slope shape, on the ground, so that both can be placed on the stage before it impacts the overall shape of the stage, but also in playback when a person on the stage, you will not hear the sound back into the microphone and squealing voice.

4. press the to: box structure can be divided into sealed enclosure, inverted phase-speakers, loudspeaker, acoustic labyrinth tube speaker and multiple-cavity resonator speaker, etc. In professional speakers using the most be inverted phase-speaker, which is characterized by wide frequency response, high efficiency, high sound pressure, consistent with the professional sound system speaker, but due to its low efficiency, professional speaker in fewer applications, mainly for household speaker, only a minority of za use a sealed box structure. Sealed box with a simple design and production of debugging, a wide frequency response and low frequency transient characteristics of good, but the dial tone with more demanding of the cell. At present, various speakers, inverted phase-speaker and sealed the proportion accounted for the majority of the speakers, other typeof sound, but the structure of the proportion of very small.

1. closed speaker (ClosedEnclosure) is the most simple speaker system, the reference made by FrederICk 1923, by speaker unit mounted on a fully sealed within the box. It can turn the speaker sound of forward and backward radiation radiation Sonic complete isolation, but because of the existence of a closed box body, increase the quality of the speakers movement produces resonance of rigid, so that speakers of the lowest resonance frequency increase. Closed some deep sound pleasures, but bass analytical, using ordinary hard Pack ring speakers, in order to be satisfied with bass playback requires a large volume of tank, the new confined speaker selection Q value most appropriate CIS of speakers. Use of enclosed in a box in the role of compressed air quality elastic, although the speaker in a smaller body, Cone back cushion will impose anti dynamic Cone, this mini-speakers also called air-cushioned speaker.

2, bass reflex speaker system (Bass-ReflexEnclosure) also known as phase-speakers (AcoustICalPhaseInverter), invented by Thuras, 1930. In its payload a voice port openings in the case of a Panel, the location and shape of the hole, but most in the hole also mounted audio conduits. Box of internal harmony between guide hole, according to the wishes of the resonance principle, in a particular frequency generated resonance, RP resonance frequency. The speakers sound wave to the radiation after catheter phase, followed by the voice of radiation to the front, and speakers for sound waves to radiation with overlapping, it provides more than closed bandwidth, with higher sensitivity, low distortion. Ideal, low-frequency replay a lower frequency than the speaker resonance frequency low 20 percent. This speaker with a smaller box will be able to produce rich bass, is currently the most widely used type.

3, sound resistance type speaker (AcoustICresistanceEnclosure) is essentially a down transformation phase-speaker, it is to sound absorption material or structure fills in the voice of intraductal, as half the airtight box control phase, so that the buffering to reduce the resonance frequency to broadening the bass playback band.

4. transmission wire speakers (LabyrinthEnclosure) is based on the classical theory of electrical transmission lines, the speaker has used behind absorbing panels made of acoustic duct, its length is required enhancement of low frequency sound wavelength of 1/4 or 1/8. In theory,It decay by the cone of Sonic, later to prevent its reflection effects to open end and woofer sound radiation, but actually transfer lines speakers have mild damping and tuning function, an increase of the speakers at the resonant frequency of the sound of the near or below, and enhanced output bass output while reducing stroke volume. Usually this speaker's acoustic duct are stacked is the labyrinth-like, also known as labyrinth, or maze-style.

5, passive radiating speakers (DroneConeEnclosure) is the bass reflex speaker system, also known as the empty branch Cone-Speaker, the 1954 United States Olson and Preston published that it openings out port consists of a no magnetic circuit and voice coil air Cone (passive cone), passive cone vibration produced by the radiation and the speakers sound forward at the same phase work status, use of Xiang tinei air and passive cone support components together make up a composite sound and quality passive cone resonance, enhanced bass formation. The speakers of the main advantages is avoiding the reflex out hole resulting instability of sound, even if the volume is also able to get good sound radiation effect, high sensitivity, which can effectively reduce the speakers spoke of the effects of small, standing waves, sound clear and transparent.

6, coupled cavity speaker is closed and the bass reflex type between a box structure, 1953, the United States, its HenryLang output by cone side driven out hole output, cone other side with a closed box coupling. The advantages of such speakers as low-frequency speaker volume driven by air has increased significantly, due to the coupled cavity is a tuning system, cone movement restrictions, the noise gate output not exceeding individual cone of sound output, wide range of low-frequency replay, distortion decreases, bear the power increase. 1969 Japan Lo-d River Island, Masahiko published A · S · W (AcoustICSuperWoofer) speaker is a kind of coupled cavity speaker, suitable for small-caliber long stroke speaker not replay bass distortion.

7, no. drum speaker (HorntypeEnclosure) for home use, the use of folding Horn (FoldedHorn) form, its horn trumpet in the mouth and larger air load coupling, drive end diameter is small, the back of the speaker is fully sealed, box cavity pressure is more on the back of the speaker cone. To protect cone around pressure balance, gas, the cartridge is placed in front of the speakers. Folding Horn speaker was a derivative of the phase-speaker, the sound effects than closed speaker General bass reflex speakers.