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.

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.

Learn and master speaking skills

Good speaker should not only has a wide range of knowledge, penetrating insights, good moral accomplishment and the ability to skillfully use the language, and must have a high logic accomplishment. So-called language accurate, essentially do concept clear, judgment, reasoning, logical. Graceful speech language always contain the impeccable logic. So, the speaker master logic knowledge, help to accurately express ideas, enhance the expressive force of language. Speech to use humor can impress the audience to make audience his heart was merry, make the whole atmosphere was active, can strengthen the attention of the audience to the speech content, deepen the audience a deep understanding of public speaking, sometimes also can turn, gains an enemy. Rhetorical question is to ask questions, but don't ask someone to answer, but to inspire people to think. Speaking in this way, can immediately drew the attention of the audience to the speaker, concentrate on to listen to a lecture. Mr Wen Multimedia Speaker "last lecture" the beginning there was a rhetorical question: "what Mr. Li made a crime, should according to this?" There isn't and ask questions here, but there is no doubt and ask, next is the argument Mr Li there is no sin, is guilty of the kuomintang reactionaries. A laparoscope, usually connected to a parallel method is more than three structural forms of the same or similar sentences in many ways, layer upon layer thorough expression method. This approach is to purify thoughts, strengthening language potential, enhance the rhythm bookshelf speaker melody beauty effect of language. Liang qichao's a laparoscope, usually connected to a "young China said" at the end of seven alliteration: "wisdom is the wisdom, young rich or national wealth, independence, the independence, freedom is the freedom, young progress is progress, young than European countries than in Europe, young males in the earth is the male in the earth." This group of alliteration, a focus on a layer, caused by touching the forthright language, incisively and vividly express the speaker's keen and full of passion, with "shock ravishing", "blood boiling god pin" drive.

Speech as a kind of relatively high intensity activity will to its essence is a kind of action

On the content of the speech full of passion. Famous speaker Albert bookshelf speaker drew said: "in the speech audience's trust, is the attitude of the speech rather than lecture content." When the speaker in the speech of passion play a key role to the success of a speech, especially in the speech "storm" by shock the audience in the lecture method of passion. It first, because the speaker's passion for speech will have a giant power on his own behavior, can make the speaker completely into the speech; On the other hand is because the speaker walked on stage and become the focus of his attention, in the audience's emotions do shake hands at the moment, due to the emotional infection function, so the speaker's passion is a key link to drive the whole atmosphere. Mr Wen Multimedia Speaker "last lecture" is attractive for people, it is because his burning emotions, fiery passion resort to speech. About the Martin Luther King, jr. "I have a dream" of the famous speech, people's mind also is first speaker that feeling hot and passionate face.This is because the speech as a kind of relatively high intensity activities, its essence is a kind of will to action. Will good qualities include: self-consciousness, self-control, decisiveness, and perseverance. Can say the four qualities are necessary to complete a successful speech. The purpose of the speaker to have the profound understanding, this is a sign of conscientiousness; In order to achieve a goal actively overcome various internal and external difficulties, such as interference resisting unrelated stimulus, regulating their emotions to the needs of the speech, witty dealing with the emergencies in the process of the speech, this is the concentration of self-control, decisiveness, and perseverance. The speaker to have higher emotional intelligence - to the audience and their own emotional state can timely grasp and properly to the effective regulation and the speech smoothly in the direction of their expectations. A man of high emotional intelligence is a man of strong will.

Bluetooth is a low-cost large capacity of short distance wireless communication standard

Bluetooth is a low-cost large capacity of short distance wireless communication standard. Bluetooth notebook computer, notebook computer with bluetooth wireless communication functions. There's a legend story under the name of bluetooth. The 10th century, northern Europe, hegemony between feudal lords as well as the Danish king stood up, under his unremitting efforts, the bloody war was brought to an end, all parties to sit down to the negotiating table. Through communication, vassals of animosity, become friends. By the Danish king likes to eat blueberries, so that the teeth have been dyed blue, said bluetooth king, therefore, Multimedia Speaker has become synonymous with communication. One thousand years later, when the new wireless communication requirements, people also use the bluetooth to give a name to it. In 1995, Ericsson first puts forward the concepts of bluetooth. The bluetooth specification by microwave band, transmission rate of 1 m bytes per second, maximum transmission distance of 10 meters, by increasing the transmitted power can reach 100 m. Bluetooth technology is a global open, on a global scale has good compatibility, can through the low cost of the world's intangible bluetooth networks into an organic whole. Bluetooth technology not only used in computers, like mobile phone, digital camera, video camera, printer, fax machine, household appliances, such as many electronic devices can use bookshelf speaker, wireless connectivity, without having to drag a tail (cable). With the popularity of bluetooth technology family decorate no longer for electrical wiring; When using electrical appliances, do not have to have a headache for a lot of remote control, a mobile phone or a car key can all done; Go out in the outside, the work arrangements of the company and home family picture can get anytime and anywhere; Clock, capture to expend without queuing, from near to expend, need not the door can easily finish... The wide application of bluetooth technology will make our life very easily. Global bluetooth specification, the mobile phone, PDA, wireless headset, notebook computers, cars, medical equipment, computer peripherals, and many other devices, as long as have a bluetooth adapter, can be easily connected bluetooth devices, transmission of data or voice communication, widely popular, good compatibility.