The Signal Power Of The Loudspeaker
There are many types of speakers, but the basic working principle is similar, are a kind of electrical signal is converted to sound signal for playback components.Speaker Currently the most widely used is the electric speaker, which consists of diaphragm, voice coil, permanent magnet, bracket and other components.
How the loudspeaker works
When the voice coil of the speaker into the audio current after the voice coil in the role of the current will produce alternating magnetic field, Speaker the permanent magnet also produces a constant size and direction of the constant magnetic field. Since the size and direction of the magnetic field generated by the voice coil are constantly changing with the change of the audio current, Speaker the interaction between the two magnetic fields causes the voice coil to move perpendicularly to the direction of the current in the voice coil, and the voice coil and the diaphragm are connected The vibration of the vibrating diaphragm is generated, and the vibration of the air is caused by the vibrating diaphragm vibration. When the input voice coil current is greater, the greater the force of its magnetic field, vibration diaphragm vibration amplitude is greater, the sound is more loud. Speaker The loudspeaker part of the loudspeaker is mainly in the center of the diaphragm, and when the center of the loudspeaker diaphragm is harder, the sound effect of the loudspeaker is better. The loudspeaker produces a bass part mainly on the edge of the diaphragm, and if the edge of the diaphragm of the loudspeaker is softer and the cone is larger, the loudspeaker sounds better. In addition, the dome speakers in the market today in the use of a lot of speakers. As we all know, the tweeter because of its high frequency of operation, in the playback of the treble when the diaphragm will be permanent magnet in the magnetic field air gap for high-speed movement, Speaker so the tweeter speaker diaphragm to the transient high-frequency signal Make a quick response. And can withstand the high-speed movement of the air pressure, so the production of materials for the diaphragm requires the quality of light, and to have sufficient strength.
Speakers have a number of technical indicators, such as impedance, frequency response, sensitivity, distortion and so on. But the reliability of the speaker, is undoubtedly a very important performance. Speaker The reliability of the loudspeaker is usually as follows, refers to the provisions of the speaker standard conditions, the provisions of the speaker to the signal power, the speaker can work for a specified time.
In particular, the sound reinforcement class loudspeaker, Speaker due to its input power, poor working conditions, continuous working time is long, the reliability of the more stringent requirements. And if the speaker suddenly damaged in the sound reinforcement work, often will bring adverse consequences. So the reliability of the speaker by the speaker technician, speaker users of the widespread concern.
Voice ring known as the heart of the speaker, the failure of the speaker in addition to mechanical factors (such as crashed, crushed, etc.), the vast majority is due to the voice coil burned, caused by the broken voice coil. In actual use, the damage caused by the voice coil is 80% or more. Speaker Electric speaker is by input audio current voice coil in the magnetic field by force vibration, promote the diaphragm and sound. Because it is the power → power → sound twice the energy conversion, so the efficiency is only a few percent to a few percent to ten percent. A large number of energy into heat, the voice coil wire, voice coil skeleton, voice coil lead heat, warming. In the work and reciprocating vibration. If you do well, there is a weak link, the voice coil will suddenly collapse, the speaker life will suddenly end, the sound signal is also an abrupt end, and do not warn in advance.