Portable Computer Speaker

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The use of computer speakers

Can be divided into full-band speakers, bass speakers and subwoofers. The so-called full-band sound means to cover the low, mid and high range audio playback. Speaker of the lower frequency band of the whole is generally 30Hz-60Hz, the upper frequency is 15KHz-20KHz.bookshelf computer speaker in general small and medium sized sound systems with only one or two pairs of speakers can be fully responsible for the whole band playback tasks. Bass speakers and subwoofers are generally used to supplement the full-band sound low and ultra-low frequency playback dedicated speakers. Such speakers typically used in large and medium-sized sound systems, to strengthen a sense of intensity and low-frequency playback of shock. When in use, mostly through an electronic crossover (crossover) after crossover, the low-frequency signal into a dedicated bass amp, and then push the bass or subwoofer.

The use of computer speakers

Computer Speaker sound system throughout the terminal, whose role is to convert electrical energy into the corresponding audio sound energy and put it to radiate into space. It is the sound system is extremely important part, because it is responsible to convert electrical signals into acoustic signals for the human ear to listen directly to such a critical task, it is to deal directly with human hearing, and the people are very sensitive hearing, and complex sound has a strong ability to distinguish sounds. Because the human ear to sound evaluation of subjective experience is a good or bad quality sound system the most important criteria, therefore, can be considered, the performance level of the speaker playback quality of a sound system is playing a key role.

The portable computer speakers

Speaker installation structure of a portable computer, including: the formation of the lower part of the body portion appearance, background Settings have guidance and positioning pin set of bottom case; Combined with the upper part of the bottom box, forms the ontology of the upper part of the appearance of the keyboard panel; In the bottom case and keyboard panel space formed by the position of the front end through have the guidance and positioning pin, in order to fixed bookshelf computer speaker.Bottom box on the underside of set has prominent ontology department internal drive installation department, speaker is installed in the bottom case, keyboard panel and drive installation department of space, as defined in the keyboard panel and side distance interval sets the speaker driver installation department. The present invention can be cut off from the loudspeaker sound units produced by vibration is passed to the portable computer around the internal components, which will not interfere with the surrounding parts of the operation, and no need for fixed to the outside of the speaker box structure, which can make the speaker miniaturization, minimize the space required for the installation, to further improve the performance of speaker.

multimedia speakers

PC  Multimedia Speaker  sound files is how to work through the sound card , the digital audio signal into an analog audio signal and then its output port , then the audio signal level is weak , usually only a few hundred millivolts , it can not push the speaker working. And a working voltage of the speaker driver generally require a voltage of several volts , then a small signal needs to be amplified by the sound output from the amplifier ( known as amplifier ) , the amplified audio signal to the audio speaker driver can convert electrical signals into sound waves a . And now the latest multimedia speakers USB sound card may not be required , it introduces a digital audio signal output of the computer through the USB interface , and USB multimedia speakers this signal through a dedicated internal USB IC chip converts quasi audio signal in order to achieve substituted card function.

Bluetooth speakers auxiliary electronics entertainment trend

Entertainment elements in our lives more and more, so who looks very serious  Multimedia Speaker  should be lively and up comes naturally, which is reflected not only in appearance, but it should be part of the core set of product features. Suitable match from portable intelligent terminal equipment, the Bluetooth speaker is undoubtedly a very good choice, easy connection, suitable equipment and more. Recent speakers Microlab H21 attention gaining momentum, built-in Bluetooth capabilities to become the core of the user attention. Users in the selection of  Bluetooth Speaker , the biggest question from the Bluetooth compatibility and ease of use, and instead focus on the speaker sound quality is not so strong, so according to the needs of most users, today we will be through a variety of devices interconnection between tests to see whether Microlab H21 IT products be wild speakers. In addition to wandering in the "need to buy a Bluetooth speaker" of users, we will provide you compare the difference between Bluetooth and non-Bluetooth use.

The classification of the bookshelf computer speaker

In real life, with general computer bookshelf computer speaker , are all below 500 yuan wooden or plastic speakers, its mostly paper cone speakers use the horn. Common computer speakers are divided into open, closed, inverter type three categories. The first open the speakers have been eliminated, is rarely seen on the market; And the second enclosed  Portable Computer Speaker can also be common on the market, as some little subwoofer and some as a surround sound speakers, etc. For the third kind of inverter enclosure is the mainstream market, computer speakers, ten seven computer speakers is to use this structure. 

Speakers structure

Our most common electric cone speaker cone . Electric cone speaker that in the past , we often say that the speaker cone , although it is still the cone diaphragm -based, but there have been many polymer diaphragm material , metal diaphragm, with cone speakers Car Speaker call it a truly a . Tapered cone speakers generally by the magnetic loop system ( permanent magnet , core columns , magnetic board ) , vibration system ( cone, voice coil ) and supporting auxiliary systems ( dampers , frames, mats side ) and other three parts.
1 . Coil : coil tapered cone speaker drive unit , which is a very thin layers of copper wire wound on a paper tube , there is generally about several circles, known as coils, placed on the guide column and the core magnetic plate magnetic suspect gap . Voice coil and cone fixed together , when the current signal is passed through the voice coil , the coil vibration led the cone vibration.
2 . Cone : cone cone cone Bluetooth Speaker speaker diaphragm materials are used in many types of natural and synthetic fibers are generally two categories . Often used natural fiber , cotton, wood , wool , silk , etc., just using rayon rayon, nylon, glass fiber or the like . As the voice of the speaker cone is a radiation device , to a large extent determines the burst performance of the speaker, so no matter what kind of cone, but also the rigid requirements of both light and good , not because of the ambient temperature and humidity changes and deformation .
3 . Fold ring: Ring is guaranteed fold axial movement along the cone speaker , set the limit lateral movement , but acts as a barrier around the cone empty 'm circulation effect. In addition to the materials used off cone ring material also use plastic , natural rubber, and pressing the adhesive through the cone .
4 . Damper : dampers used to support voice coil and cone binding site , to ensure its vertical rather skewed. There are many concentric ring damper , the voice coil in a magnetic gap that is free to move up and down without moving laterally , to ensure not collide with the magnetic coil plate . Dust damper on the outside in order to prevent dust off the magnetic gap , the voice coil to avoid dust and friction , leaving the speaker to produce unusual sounds .

Electric loudspeaker works

Electric speaker also called dynamic speaker ; It is the application of the principle of electro-acoustic electric transducer device ; it is the use of the largest and most extensive speaker , there are three main reasons :
1 . Simple electric loudspeaker structure, easy production , and does not require a large space Portable Computer Speaker itself , resulting in cheaper price can be a lot of popularity .
2 . Such speaker may be excellent performance can be obtained even in the band of frequency response.
3 . Such continuous improvement speaker , the speaker decades of history , is the speaker design, technology , Wireless Speaker materials, continuous improvement of history, but also the times performance history.

Other speakers works

< A > Magnetic speaker : also known as " Reed speaker " , the structure shown in Figure 4 , between the poles of the permanent magnets having a movable core electromagnet , the coil of the Multimedia Speaker electromagnet when there is no current , the movable core phase by the two poles of the permanent magnet attract attractive level , in the center remains stationary ; when current flows through the coil , the movable iron core is magnetized to become a shaped magnet . As the current changes direction , the polarity of a corresponding change in the bar magnet , the movable iron core for rotary movement about a fulcrum , the movable iron core by the vibrations transmitted to the cantilever diaphragm ( cone ) to promote hot air vibrations .
< Two > electrostatic speaker : it is applied to the capacitor electrode plate using the electrostatic speaker working , to see the structure of a capacitor formed by facing the positive and negative form , also known capacitive speaker. As shown, there are thick and hard Wireless Speaker material as the two fixed plates , the plates can have the sound through the middle of the plate with a thin, lightweight material used for the diaphragm (e.g., aluminum ) . Fixed around the diaphragm , which is very taut to keep a considerable distance and fixed , even in boosted film tends not to collide with a stationary pole .
Existing between the electrodes a DC voltage ( called bias ) . If the audio output by the amplifier plus a voltage between the two electrodes , the output voltage relative to the original overlapping and pulsating alternating voltage , the ripple voltage generated in the gap between the poles of attraction strength change, and therefore the diaphragm vibration sound.
Advantages of the entire diaphragm electrostatic loudspeaker phase vibration , light diaphragm , distortion, can be extremely crisp sound reproduction with good resolution , detail clear , lifelike sound . Its disadvantage is low efficiency, high-voltage DC power needs , easy cleaning , the diaphragm will increase the distortion increase , not suitable to rock , heavy metal music , the price is relatively expensive.

Car horn works

Automotive electric horn from the core, the magnetic coils, contacts, armature, diaphragm and other components. When the driver presses the horn switch, the current through the coil through contacts, under the armature coil produces a magnetic suction force the diaphragm to move the armature to move the contacts open, the current is interrupted, the magnetic coils disappeared, diaphragm spring in their bookshelf computer speaker flexibility and hereinafter together to restore the role of the armature in situ, contact closure circuit is switched on again, the current flowing through the coil generates a magnetic force through contacts, repeat the above action. This cycle repeated continuously vibrating diaphragm, which emit sound. Wooden Computer Speaker bSoundboard rigid connection with the diaphragm, smooth sound vibrations can be more pleasant.

Car Speakers

1 Remember when washing to prevent Wooden Computer Speaker the speakers get wet, dry as soon as the water found in the horn with air gun.
2 Try not always long honk the horn contacts so easily lead to premature ablation.
3 speaker fails try to seek professional Car Speaker help repair technician, do not blindly replace the speaker, likely to cause unnecessary waste.

TV Speaker horn does not sound

Car horn does not sound also divided into several cases, one is sometimes not loud , loud sound awkward one is , there is a car horn does not sound entirely .
1 sometimes does not ring . Horn switch , if the speaker is sometimes loud, sometimes does not ring, Multimedia Speaker inside the horn switch contacts touch bad , some of them are horn itself.
2 hoarseness . Mostly due to poor contact plugs , especially various contacts around the steering wheel , because frequent use , easy to make contacts to wear.
3 . Completely sound . First check to see if the fuse blows, then unplug the speaker plug , measured with a multimeter here has power when the horn switch. If there is no power , check the speaker wiring bookshelf speaker and horn relay ; If there is power , it is the speaker itself is the problem , then you can try to adjust the adjusting nut on the horn to see if sound, if you still do not ring , you need to replace the speaker .
Automotive experts say , in a car horn failure, failure is often the speaker itself when problems arise . When the speaker does not ring , commonly no more than 3 parts of the fault point, the speaker itself, the horn and the horn switch contact wire harness when the vehicle horn according to the above failure

Car horn - Maintenance

Size electric horn speaker volume and by the size of the coil current , the current through the greater the greater the volume , whereas the volume is small , the contact pressure can be bookshelf speaker to change the volume . Adjust speaker volume and sound quality are interrelated , and therefore need to repeatedly adjust to get the best sound. Car horn - Maintenance
( 1 ) keep the speaker looks clean , all the wiring to be reliable .
( 2 ) regular checks , tighten the speaker and bracket fixing screws , to ensure its reliable grounding .
Fixing method ( 3 ) a greater impact on its speaker pronunciation . In order to make the speaker sound normal, the Multimedia Speaker can not be done rigidly mounted , so fixed on the bumper brackets , that is, between the speaker and the mounting bracket to be fitted with leaf springs or rubber mats .
( 4 ) Always check the generator output voltage. Voltage is too high will burn horn contact , low voltage ( below the speaker 's rated voltage ) speakers will emit abnormal sounds.
(5 ) Wash , rinse water can not be directly megaphone to avoid leaving water into the speakers do not sound the horn .
( 6 ) in the maintenance of the speaker , should pay attention to the position of each metal pad and insulation pads , non- installed wrong .
( 7 ) shall not exceed speakers pronounce consecutive 10s, so as not to damage the speakers.
( 8 ) The various types of foreign objects into the speaker can not avoid abnormal sound

Car audio installation

As is known to all, people mainly from receiving positive noises in my ears, in the narrow space car, reasonable arrangement of the speaker position, make the person is in the front seat can be perceived from the windshield clear voice, rather than from the foot, in 后排座 also try to make people feel voice from front, not behind my ear. Moreover due to the Multimedia Speaker of the left and right speakers deviation, want to make different seat area can feel good music balance, will need a different placement will be the speaker to correct deviation distance. From this perspective, the difficulty of the car stereo positioning is much more than the home stereo. Thus, the design of car audio installation is need professional technology to complete. According to expert introduction, a good car audio installation, to meet the four requirements: one is the stereo matching set is reasonable, and bookshelf computer speaker performance, space and the owner requirements phase, appropriate to decorate in the process does not destroy interior is the best. Second, the sound field location accurate, has a good audio-visual effect, build and space sound field, sound stereo, continuous spectrum curve is smooth, can maintain full range from low to high. 3 it is the appropriate sound pressure, a set of high quality car audio when sounds up to 130 decibels can still maintain the voice is not distortion, restore power to get maximum play; Four is the level of the installation, including the design of the terminal connections, decoration and harmony of the original car, thermal design and the design of the overall power amplifier.

The principle of the car horn

Horn, which has two kinds of gas and electric horn speaker, electric horn by electromagnetic coil electricity and power outages, make the metal diaphragm produces vibration and acoustics, sound pleasing to the ear. Electric horn shape is a spiral and basin type, Wireless Speaker used in all kinds of cars. Light passenger cars are electric horn. Air horn using compressed air flow make the metal diaphragm produces vibration, appearance is more long horn (cylindrical), more sound and a higher tone, long transmission distance, multi-purpose on running a long distance of large and medium-sized cars within the city is disabled. Spiral car electric horn attached speaker cone, roll up into a spiral in a compressed volume, beautiful sound loud and clear. Basin shape car electric horn without speaker cone, shape flat Bluetooth Speaker volume, light weight and easy installation, quality slightly but widely used. Basic working principle of spiral and basin shape is the same, by the static and dynamic core, magnetic coil, contact core, diaphragm, and so on. When the driver presses the button, the electricity flowing through the contact through the coil, a coil magnetic suction under the force of moving iron core diaphragm moving armature move off contact, magnetic current interrupt disappeared, the elasticity of the diaphragm in itself and under the action of leaf spring and recovery in situ with moving iron core, contact closure circuit connected to electric current to pass through magnetic coil, contact the repeat the action. So follow bad diaphragm vibration unceasingly, thus the sound. Help the resonant cavity with the rigid connection of diaphragm, can make the vibration smooth sound more pleasing to the ear. Among them the clearance between the contact and contact arm small excitation frequency is high; Gap big excitation frequency is low, that is, different clearance adjustment, speakers will be encouraged by forced vibration of different frequency and different noise generation. Due to the above analysis shows that the horn diaphragm is forced vibration.

Horn according to its pronunciation power has the branch of electric horn and air horn

Horn according to its pronunciation power has the branch of electric horn and air horn; According to the points with bookshelf computer speaker shape, cylindrical and three types of basin shape; According to the audio can be divided into high and low sounds the horn; According to the connection mode can be divided into single and double line system horn; There can be divided by a non-contact touch point (common type) electric horn and contactless electric horn (electronic). Among them, the air horn is mainly used for heavy bookshelf speaker truck with air brake, electric horn has simple structure, small volume, light quality, sound sweet and easy maintenance characteristics, thus obtained is widely used in small and medium-sized vehicles. Should be paid attention to when adjusting the core and the clearance must be uniform around the armature, a right, not skewed, otherwise easily happened collided with each other at work, make the speaker produces shrill noise.