Wireless speakers

Wireless Speaker were: Bluetooth wireless speakers, wifi wireless speakers, 2.4G wireless speakers, FM radio speakers.

Bookshelf Speaker production

In recent years, popular music appreciation  bookshelf computer speaker by urban residents of all ages, this speaker is more suitable for city dwellers living room. Its placement is more flexible and can be placed on a shelf, on the table, next to the TV, etc., also can be used with home theater and Kara OK system as the main speaker (just below the speaker added a pair of stylized stand ). With a box of pluripotent characteristics. Bookshelf speaker sound bright and clear, wide range, resolution is particularly good, people are listening to music can also talk about Syria freely, without interference from the speaker roar.

Active bookshelf speakers

Multiplayer Since becoming a playback beautiful effect in the hands of many young friends pets , especially now with the advances in technology and improve the ability of people to enjoy , and many already have some of the features multiplayer mini hi-fi 's ,
Multiplayer Since becoming a playback beautiful effect in the hands of many young friends pets , especially now with the advances in technology and improve the ability of people to enjoy , and many already have some of the features multiplayer mini hi-fi , a lot of fans used radiotherapy alone as the source.
But lack of multiplayer side, small output power, so many young people buy fewer friends speakerphone bookshelf speaker, namely active speaker as a multiplayer power expansion .
The market price of the sale of the active speaker Philippines , so make yourself a pair of powered speakers , one can save money , and secondly to improve the ability to experiment yourself .
Considering the difficulty and cost of production should not be too large, this set of active speakers, integrated circuit TDA2822 based, supplemented by a wide band of high sensitivity speakers, its compact size, beautiful sounding playback .
This is only a small active speaker with speakerphone capabilities. To reduce tedious function controls on the volume control potentiometer volume control multiplayer , multiplayer if they can have three sections with tonal balance and auto- turn function better.

Multimedia speakers composed by the above description

Multimedia speakers composed by the above description, we know how to work multimedia speakers , then we can easily know some multimedia speakers is part of it. First, it needs to have an interface with the computer chassis portion connected to the sound card ( if it is USB speaker is connected to the computer 's USB port ) . The sound signal so as to introduce the speaker sound output amplifier. The interface is usually part of a three-pin plug both ends two- conductor shielded cable composition ( if it is USB speakers , you need a dedicated USB interface cable ) . The second part is the amplifier , its role is sent to the sound card ( or USB chip output ) weak audio signal to be amplified, making enough to push the speaker sound normal , but also both the amplifier control functions , such as controlling the volume , treble bass gain and attenuation control , there are some added amp sound field control , such as SRS. The last part is the speaker , and it is responsible for the audio signal sent by the amplifier into sound waves, speaker cabinet is made ( usually made ​​of wood and plastic ) and speaker units, if the amplifier and speakers are independent , we this speaker is said to passive speaker : If speaker and amplifier are assembled together ( usually in the speaker amplifiers are installed inside ) , we call this speaker is powered speakers . Multimedia speakers currently on the market for the vast majority of speakers, because manufacturing costs are relatively lower than the active passive speakers . However , the sound quality is often passive speakers (with separate amplifiers ) than active speakers . If the USB speakers, multimedia speakers is necessary to increase the USB audio decoder and control section.

The classification of the speaker

Horn according to its pronunciation power has the branch of electric horn and air horn; According to the points with spiral 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 duty 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. 

Multimedia speakers composed by the above description

we know how to work Multimedia Speaker , then we can easily know some multimedia speakers is part of it. First, it needs to have an interface with the computer chassis portion connected to the sound card ( if it is USB speaker is connected to the computer 's USB port ) . The sound signal so as to introduce the speaker sound output amplifier. The interface is usually part of a three-pin plug both ends two- conductor shielded cable composition ( if it is USB speakers , you need a dedicated USB interface cable ) . The second part is the amplifier , its role is sent to the sound card ( or USB chip output ) weak audio signal to be amplified, making enough to push the speaker sound normal , but also both the amplifier control functions , such as controlling the volume , treble bass gain and attenuation control , there are some added amp sound field control , such as SRS. The last part is the speaker , and it is responsible for the audio signal sent by the amplifier into sound waves, speaker cabinet is made ( usually made ​​of wood and plastic ) and speaker units, if the amplifier and speakers are independent , we this speaker is said to passive speaker : If speaker and amplifier are assembled together ( usually in the speaker amplifiers are installed inside ) , we call this speaker is powered speakers . Multimedia speakers currently on the market for the vast majority of speakers, because manufacturing costs are relatively lower than the active passive speakers . However , the sound quality is often passive speakers (with separate amplifiers ) than active speakers . If the USB speakers, multimedia speakers is necessary to increase the USB audio decoder and control section.

Multimedia speakers composed by the above description

we know how to work Multimedia Speaker , then we can easily know some multimedia speakers is part of it. First, it needs to have an interface with the computer chassis portion connected to the sound card ( if it is USB speaker is connected to the computer 's USB port ) . The sound signal so as to introduce the speaker sound output amplifier. The interface is usually part of a three-pin plug both ends two- conductor shielded cable composition ( if it is USB speakers , you need a dedicated USB interface cable ) . The second part is the amplifier , its role is sent to the sound card ( or USB chip output ) weak audio signal to be amplified, making enough to push the speaker sound normal , but also both the amplifier control functions , such as controlling the volume , treble bass gain and attenuation control , there are some added amp sound field control , such as SRS. The last part is the speaker , and it is responsible for the audio signal sent by the amplifier into sound waves, speaker cabinet is made ( usually made ​​of wood and plastic ) and speaker units, if the amplifier and speakers are independent , we this speaker is said to passive speaker : If speaker and amplifier are assembled together ( usually in the speaker amplifiers are installed inside ) , we call this speaker is powered speakers . Multimedia speakers currently on the market for the vast majority of speakers, because manufacturing costs are relatively lower than the active passive speakers . However , the sound quality is often passive speakers (with separate amplifiers ) than active speakers . If the USB speakers, multimedia speakers is necessary to increase the USB audio decoder and control section.

Bluetooth Speaker

Bluetooth speaker refers to a built-in Bluetooth chip to connect a Bluetooth audio device to replace traditional wire connection , by connecting with the phone , such as tablet PCs and notebook Bluetooth playback devices , to achieve the purpose of convenience . Currently, portable  Bluetooth Speaker  to speaker -based, generally more compact and portable form factor , Bluetooth speaker technology with its convenient user-friendly features gradually being valued and accepted by consumers , the common market are mostly mono  Bluetooth Speaker  speaker ( single speaker unit ) , but also the emergence of a number of excellent sound quality multi- channel speaker ( two or more speaker units ) .

How to choose and buy computer Bluetooth speakers

In today's computer, no sound box is unthinkable.  Bluetooth Speaker has become indispensable in multimedia computer configuration, but with the speakers, if is a inferior products, all day just come some noise ear sound, you also must be difficult to have to endure not satisfied! How to choose and buy a satisfactory speakers, this is an issue many beginners can't understand, they tend to think, as long as you can speak, appearance looks beautiful. Actually otherwise, the  Multimedia Speaker  is the most difficult to choose in all kinds of computer accessories, choose speakers learning maximum. Although many computers is introduced about how to choose the speakers are newspapers and magazines, but the author this think it's necessary to repeat again, after all, choose sound box is a "opinion views".

Car Speaker Size

Measurement speakers ( speakers, jargon " unit " ) to calculate the size of the effective vibration radius. Ie not pressed into the outer edge of the cone fixed apron diameter count , it is customary for the speaker diameter in inches .
Most people use mostly Car Speaker metric ruler , measure how many centimeters the cone diameter , divided by 2.54 ( 2.54 centimeters equals one inch ) , is an inch.
4 -inch speaker : the screw holes on the angular distance is 11.5 cm , adjacent pitch 8 cm , horn diameter is 10 cm ;
5-inch speaker : the screw holes on the angular distance is 13.5 cm , adjacent pitch 9.5 cm , diameter 13 cm ;
6.5 -inch speaker : the screw holes on the angular distance is 15.5 cm , adjacent pitch 11 cm , diameter 16.5 cm ;
4X6 inch screw holes adjacent bookshelf speaker distance is 12.3 cm and 7.3 cm ;
6X9 inch screw holes adjacent distance is 16.5 cm , respectively, and 11 cm .

Electrodynamic loudspeaker cone shape mostly , dome -shaped ; cone speaker (cone speaker) structure.

Speaker cone structure can be divided into three parts:
1 > vibration system Bluetooth Speaker including the diaphragm , voice coil, dampers , dust cover , etc.
2 > of the magnet system comprises a magnetic plate , magnetic columns, the magnetic plate , a magnet , etc.
3 > auxiliary systems including frames, blank , wiring racks, phase plug strip .
According to Faraday 's law , when a current-carrying conductor through the magnetic field , an electromotive force Multimedia Speaker will be in a direction in line with Fleming 's left hand rule , force and current, the magnetic field direction perpendicular to each other , and the current size of the force , the length of the wire , a magnetic flux density proportional . When the voice coil audio input alternating current, alternating coil is subjected to a driving force alternating movement, led cone vibration, repeatedly pushing the air and sound.

Speaker Classification

Piezoelectric Speaker : using the inverse piezoelectric effect of piezoelectric materials and working speaker called a piezoelectric speaker . A dielectric ( such as quartz, crystalline sodium potassium tartrate , etc. ) occurs under pressure so that the Multimedia Speaker polarization potential difference between the both end surfaces of the phenomenon called " piezoelectric effect ." Its inverse effect, that is placed in the electric field of the dielectric elastic deformation may occur , known as " reverse piezoelectric effect" or " electrostrictive ."
Piezoelectric speakers compared with electrodynamic loudspeaker does not require magnetic and electrostatic speakers do not need to bias compared to a simple , cheap , big drawback is distorted and unstable.
Ion Speaker: In normal state , the molecular weight of the neutral atmosphere , it is not charged . But after a high-voltage discharge after becoming charged particles , a phenomenon known as ionized . The ionized air vibrations using an audio voltage , the resulting sound waves , which is the principle of ion speaker .
For ionization , it is necessary to 20MHz high frequency voltage , the piezoelectric overlapping audio signals thereon . Seen by the high-frequency oscillation section ion speaker , an Multimedia Speaker audio signal modulating section , the discharge chamber and horn components.
Discharge chamber using quartz rod diameter of 8mm hole in the center , open into a quartz tube , which is inserted an electrode and another electrode , the cylindrical sleeve in a quartz tube outside, thanks to the silent discharge form, only the center needle electrodes loss center electrode can be replaced periodically . Ion speaker that differs from other speakers at no diaphragm, so the transient characteristics and frequency characteristics are good, but the structure is too complex.
Fire Speaker : When the air and gas flame burning through the electrode , the electrode plus a DC voltage and high-frequency signals , fire and sound by audio signal modulation . Flame almost massless , dynamic sound excellent . But it has a fatal drawback : unsafe , inconvenient.
Airflow modulation Speaker : also known as airflow speaker. It is the use of compressed air as an energy source , the use of current modulation airflow sound audio speakers. It consists of the chamber , a modulation valve , horn and magnetic components. Compressed air from the air chamber through the valve , the external audio signal is modulated by that flow fluctuations vary according to the applied audio signal while being modulated by the air horn coupled to improve the efficiency of the system. It is mainly used as source or remote radio noise environments such as high-strength tests .

How to correctly use the horn ?

During the day, as people affected by the sun , the light signal is relatively weak reaction to the car . Therefore , daytime running vehicles generally use acoustic signals to remind people , to let people know the approximate distance and direction of the vehicle. But because of some drivers , regardless of the occasion, habits and frequent use of car horns leaving it very offensive , resulting in the current section of the city and many of the city 's district banned in most motor Car Speaker vehicle whistle ; On the contrary , there are some drivers in Shique should not use the car horn , resulting in a traffic accident .
Regardless Hao Jinming , paste mess blind by some good . In driving the process , the driver correctly whistle, traffic safety will bring huge benefits.
1 , as much as possible ahead of the front of the whistle to remind pedestrians and vehicles , do not wait has been very close to the pedestrian and the vehicle ahead whistle ; remind pedestrians to avoid using whistles , causing pedestrians to avoid panic . ( Pedestrian Once panic, it is difficult to grasp the law of action )
2 , other emergency situations in case you did not notice triggered , brakes plus whistle disposal than just the way you want to brake well ( electric horn tooting area ) ; in front of pedestrians and vehicles being squeezed when forced , the appropriate relative better than piccolo flute . ( Can cause each other to get your attention , to resolve Bluetooth Speaker common occurrence of the disaster )
3 , driving in the vast suburban road , do not use the whistle to save as much as possible with a short distance in front of the whistle to remind pedestrians and vehicles. ( A vast area on the outskirts of the highway will not be tooting it )
4 , in preparation for overtaking and overtaking process, try to remind and confirm with Piccolo in front of the vehicle driver . ( To be super driver of the vehicle will not be chatting phone? )
5 , after the whistle to remind pedestrians and vehicles in front of the role is confirmed, try not to whistle again. ( Word always repeated that really make people feel disgusted )
6 , the former had fork, fork , and the downtown section of town , ( except Jinming District ) ahead of deceleration and whistle . ( Fork, fork a lot of accidents happen )
7 , even if the vehicle traveling in the region Jinming should also ensure normal working conditions electric horn , in case of emergency situations. ( Even some of the police penalty shall also much easier than accident claims )
8 , met with a flute urged to avoid blocking the road in front of vehicles and pedestrians, people avoid using call whistle way .
9 in the evening to avoid traffic whistle , because the light signal conversion is far better than the role of whistle .

Car Speakers

One, easy to damp Mifengbuyan: Although the internal speaker is closed, but if Mifengbuyan wash the interior space into a mist or water vapor in the air, moisture vapor can easily lead to contacts does not work.
Second, the electromagnetic coil terminal bad: Some speakers inside the solenoid wire terminal connectors are Multimedia Speaker crimped aluminum rivet connections, non-reliable solder connection, if the insulating paint on the handle end wire without a net or a rivet crimping insecure easily produce virtual connection failure, resulting in poor horn work. Such failure is the speaker quality reasons, can not be repaired, only replaced with new parts.
Third, contact ablation: If prolonged honk the horn contact ablation and could easily lead to an impedance, the current flowing through the solenoid weakened, unable to attract the armature electromagnetic bookshelf computer speaker suction decline driven by the normal vibrations of the diaphragm, resulting pronunciation husky, do not even ring . But constantly honk if strong electric moment

In the traffic laws, the use of the car horn, made ​​such Speaker

1, motor vehicle approaching sharp bends, etc. affect the safety of the top of the ramp sections and overtaking sight or the event of an emergency, should slow down and honk to indicate.
2, the front of the vehicle in case the vehicle is parked or driving slowly while waiting in line, waiting or turn driving bookshelf speaker not enter non-motor vehicle lanes, sidewalks driving, urging shall honking vehicles and pedestrians.
In other words, the role of car horns, is a special section of the advance warning, the warning of some emergency Multimedia Speaker, in order to ensure traffic safety.

Car Speaker Response

It determines the maximum sound speakers that can emit a strong feeling of sound macro is the biggest shocking . The indicators in terms of multimedia speakers , in fact, the significance is not great unless the room is a great need to have enough sound pressure to meet the bookshelf speaker of the listener . International speaker on the power of performance indicators marked in two ways: Rated power ( long-term power ) and Maximum Power ( PMPO instantaneous power or musical power MPO). The former refers to the speaker within the rated frequency range provides a continuous analog signal waveform at a certain interval and repeat a certain number of times, without any damage to the speaker maximum electric power ; latter refers to the speaker can withstand short-term maximum power . Typically businesses in order to meet and consumer psychology , there are often large music power marked tendency , so we should buy multimedia speakers rated power prevail. Speaker's power amplifier chip is mainly determined by its power , in addition to the power supply bookshelf computer speaker related. Although the speaker's power is better, but enough is enough for the average home user 20 sq. m around the room speaking , 30W speaker , or a combination of 2.1,4.1 about 40W subwoofer is already more than enough , and then high-power speakers only help you waste money that quot;? merit " in the power side陎, Hongxi speakers already for you to make the best choice , so if you are fond of the words of the speaker of the Chang Foundation , the power can be ! no longer consider the frequency response of the frequency range : the former refers to the playback frequency range of the speaker and the lowest effective playback frequency among the most significant , in Hertz (Hz); the latter refers to a constant voltage output of the audio signal and the speaker when connected to the system , the sound pressure generated by the speaker changes with increasing frequency or attenuation occurs , the phase change with frequency of the phenomenon , the relationship between changes in sound pressure frequency and phase associated with the known frequency response units decibels (dB). sound pressure and phase lag versus frequency curves are called " amplitude-frequency characteristics " and " phase-frequency characteristics " , collectively, the " frequency characteristics ." this is to investigate the merits of the speaker is an important performance indicator , it and speaker performance and price has a direct relationship , its decibel value smaller the speaker frequency response curve more fair Tanzania , distortion smaller, higher performance , such as : a speaker 's frequency response is 60Hz-18kHz +-3dB for the present the middle and low speaker, mostly because of poor sound quality ( distortion serious ) or the manufacturer's technical staff of the concept of frequency response and the frequency range of the speaker leads to no clear labeling . usually marked frequency response in see quot;? system frequency response "and" amplifier frequency response " to know " the system frequency response " is always better than " amplifier frequency response "small range , so only marked" amplifier frequency response " has no meaning , which Some just to deceive unsuspecting consumers. Speaker manufacturers now generally marked on the system frequency response range is too large , high-frequency part of the difference is not a lot , but in the low end is too outrageous : three hundred dollars dare wooden speaker frequency response of the low-frequency standard to fifty or sixty Hz or even lower , to know foreign brand high-end speakers ( worth thousands of dollars ) only in the vicinity of the low-frequency Frequency standard fifty or sixty hertz , so we advise bass ears must be true , do not easily believe propaganda value on the list . Another point to note is : now there is a wrong tendency to buy multimedia speakers , the lower frequency limit value is too low frequency part . To know

Car amplifier bass

Due to space limitations, car bookshelf speaker bass placed to achieve stability and good heat dissipation, the best choice is, of course, the car trunk. This inevitably brings two problems, one is how to reduce the volume of equipment to the trunk occupation and the function, the second is how to in as little as possible to destroy the car interior conditions to minimize the audio signal transmission line loss. Car stereo effect is inevitably affected by the engine sound, external airflow noise interference, these effects mainly focused on the bass drum and bass, so the car install bass speaker is particularly necessary. Just a mount and inferior bass, feel better than before, but listen to a period of time will feel, bass vague, bosom frowsty, mind after listening to get confused. This is because under the Multimedia Speakers of distortion into noise, the noise can damage the brain damage the body. Advice for sound of friends here, and don't covet is cheap sell junk, modified again found problems in the future, will abolish many equipment, spend more than necessary. Do not think that running must be expensive, both lobster and Fried potatoes. But the taste is worth tasting, here are even cheap packages, equipment quality guaranteed, and can enjoy the first-class installation technology and good after-sales service, will have the feeling of the value.

Car horn points have electric horn and two loudspeakers

Car horn points have electric horn and two loudspeakers, electric horn by electromagnetic coil electricity and power continuously, make the metal diaphragm produces vibration and acoustics, sound pleasing to the ear. Electric horn shape is a spiral and basin type, widely used in all kinds of cars. Light passenger cars are electric horn. Air TV Speaker 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 small volume, light weight and easy installation, quality slightly but widely used. Basic working principle of spiral and basin shape is the same, is Computer Speaker by iron core (1), (2) the magnetic coil, contact (6), the armature (5), diaphragm (3), etc. When the driver presses the button (8), electricity flows through the contact through the coil, a coil magnetic suction under the armature (5) mandatory diaphragm moving armature move off contact, magnetic current interrupt disappear, elastic diaphragm in itself and under the action of leaf spring and recovery in situ with armature, 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. The soundboard (4) and diaphragm rigid connection, can make the vibration smooth sound more pleasing to the ear. Car horn on high frequency with high, medium and low bass three. In order to make the car horn tone more plump, some electric horn of the car horn and got behind the tones of high and low, form a dual tone horn. But this current is bigger, will directly endanger the button contact. In order to avoid the horn button contact is arc spark burn out, some car in line to join a relay, with a small current to control large current, make the horn button only from damage by small current. Need to point out that the positive line (7) of the average car horn is supplied by the fuse box, anode electric horn button is the control of the car horn, so commonly known as the horn button line for the "system". General motors electric horn of tone and volume can be adjusted, by adjusting the gap between armature and core adjustable tones, adjust the contact pressure adjustable volume, once the volume, coil current changes. In order to keep the sound volume, there are some electric horn is fully sealed, are not allowed to adjust, change is broken as a whole.

The working principle of the car horn

Auto electric horn is to rely on the Multimedia Speaker of the metal diaphragm to sound. Automobile electric horn by core, magnetic coil, contact, armature, diaphragm, etc. When the driver presses the horn switch, electricity flows through the contact through the coil, a coil magnetic suction under the armature, mandatory move diaphragm, armature move off contact, interrupt current, coil magnetic disappeared, diaphragm armature on bookshelf speaker own flexibility and spring leaf restored with in situ, contact closure reclosing circuit, current pass through magnetic coil, contact the repeat the action. So circular diaphragm vibration unceasingly, thus two sound. Soundboard and diaphragm rigid connection, can make the vibration smooth sounds more pleasing to the ear (namely electromagnet principle).