Electric loudspeaker

The electric speaker diaphragm vibrates force is magnetic force of the current carrying conductor , we call this effect the electric force effect transducer , the size specified by the following formula :
F = B L i
Where : B is the magnetic flux density in the gap (intensity ) , in units of N / (Am) < N / ( ampere meters ) > also known as Tesla (T)
L is the length of the coil wire , the unit: m
i is the current flowing through the coil unit: Ampere
F is the magnetic force on the Computer Speaker voice coil units : Newton
However , the force in the movement of the voice coil is energized , while the magnetic gap due to the magnetic field will cut line so as to generate an induced electromotive force in the voice coil , we call this effect electric transducer electrical effects , the size of the Wooden Computer Speaker induced electromotive force :
е = Вiν
Where : v is the voice coil vibration velocity in units of : m / s
е electromotive force induced in the coil , the unit is : V
Electrodynamic loudspeaker force effect and electrical effects are simultaneously present, accompanied by the line .

Car horn repairs

Speaker is not the main reason for the ring or voice hoarse with insufficient battery to save electricity, horn relay and buttons damage, damage to the speaker, and so on. Specific as follows:
1, check the speakers' chirp, if feel singing is not clear, deep and weak, contact of mostly poor contact.
2, repeatedly Wireless Speaker the horn switch, if the horn honk sometimes, sometimes not ringing, mostly push switch internal contact contact is not good.About 3, turn the steering wheel, if there is a larger friction "hiss" sound, you can ask the relevant contact parts some grease injection.
4, if the speaker doesn't ring, first check the fuse to see whether the fuse, then unplug the speaker plug, when the horn switch is measured with a multimeter here whether there is electricity. Without electricity, should check the horn harness and horn relay; If there is electricity, it is a problem of the horn itself, this is also can try to adjust the horn on the adjusting nut to see if you can, if or not, you will need to Wooden Computer Speaker the horn.
5, if the speaker's chirp depressing, is likely to be the speaker's own fault, as long as you knock speaker at this moment, most can be improved. Joint is poor contact, especially the line around the steering wheel, due to the use of frequent, easily lead to wear and tear.
6, untight seal is easy be affected with damp be affected with damp, though the internal speakers is airtight, but if the untight seal to wash the car, easy to enter the fog or internal space have water vapor in the air, water vapor is easy to cause contact be affected with damp be affected with damp and not work properly.
7, horn work at low speed in cars, related to the performance of the battery, if the battery energy is reduced, the trumpet sound less, to check whether the battery storage capacity is normal.In addition, in the horn button, can use a multimeter or view lamp to check, check the electric current to the speaker terminals, if there is current to the terminal, but the speaker did not ring

The speaker should have quality

First, the speaker generally will absorb a certain amount of psychological burden, of course, sometimes it is easy to appear the psychological imbalance phenomenon. This requires the speaker to strengthen the psychological training at ordinary times, have good psychological quality, both warm and decisive, and calm, and still can talk. Generally speaking, successful bookshelf speaker should have the following psychological quality:

1, full of confidence

Self-confidence is an important psychological support, the speaker and has important effect on the result of the speaker. It can be the speaker's determination, the Wooden Computer Speaker spirit, give full play to the speaker's creativity.

2, the success of the strong desire

Success is to promote the important drive of the speech, it is in the speech behavior plays a huge boost. It can trigger psychological motivation of the speaker, the speaker is highly concerned about the result of the speech, which aroused the concern of the speaker to speech and presentation skills, prompting continuously improve the speech, to get better grades.

Second, the personality of the speaker

Personality refers to a person's character, a noble and humble. As a speaker, he is

Need is a healthy personality and sound personality, noble personality. Because speech is a kind of thought, reason and passion infect others, move and inspire others, the speaker must have a noble personality and moral character, is likely to conquer the audience, moving heart, play the role of speech should be. A man interested in learning the speech, to truly become a master of speech, we must first pay attention to shaping noble personality, and use a variety of favorable environment to make their own to the noble personality, positive, health aspects of change.

Third, the speaker's ideological quality

The speaker for the enlightenment people's ideas, cultivate people's sentiment, the mission of inspiring people to go forward, he should be true of midwives, is full of grave digger. Shall be advanced, scientific thoughts, even a thinker of The Times. Only profound ideological cultivation, vision. A short-sighted and insular person is not qualified to the podium.

Fourth, the speaker's moral quality

One must dare to stand up for the truth. Many successful speakers and their speech can deeply rooted in the hearts of the people, they are able to by the people's support and love, is that they dared to stick to the truth, thrash ugly, distinguish between right and wrong, justice, with a cry for justice, fight for the truth of the good qualities.

Second, we must kind-hearted, aboveboard. If a speaker narrow-minded, selfish, concentrate on making profits, intrigue, that his talk will be shortness of breath; Only the broad heart, magnanimous, aboveboard, selfless, and will speak cliches weight.

Third, we need a teacher by worthy example. The speaker to give others the power of a moral lesson, first should be the model and the model of the masses.

Five, the cultural quality of the speaker

The speaker is not only the disseminator of the culture, but also the builders and creators of culture. High cultural quality of the speaker, always speaks and logically, commands, penetrating into the coming, casual attitudes, whether it is a profound truth, original ideas, or sincere expectation, surging passion, all can get the exact expression, fully express, make the audience to produce the feeling of "WenJun a words, bullet hole in my head".

Sixth, the speaker need profound knowledge

No speaker is not knowledgeable in all ages of people, in their speech in many respects practice, witty, open the hearts of people, and the exit correctly, fingertips, vivid apt,, let a person listen to increase knowledge, enjoy. Extensive knowledge can make people beautiful, vivid knowledge can let a person cheerful, new knowledge is fascinating.