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Speaker Vibration and Its Influence on Speaker Quality

The speaker is the last and most important component of the entire sound system process. A good speaker, in addition to have a good speaker unit and a good matching divider, the speaker box structure and process has a very important impact and role. The characteristics of the speaker unit on the speaker playback effect has a decisive role, many articles have said that the unit of the impact of sound quality accounted for 70%, 30% of the box. This is a widely accepted concept, and in accordance with this concept to "catch big release", the speaker unit and the frequency divider to do a lot of fruitful work. And in the speaker box research is relatively less. Now the speaker of some technical indicators (such as distortion, etc.) test method is tested in low-power conditions. In the actual use of the conditions, the speaker is in the medium power or greater power to work. Under this working condition, the vibration of the loudspeaker unit and the vibration of the speaker box are much greater than those under the standard test conditions. In the low-power work is not a very serious beats by dre on sale problem, it will become very serious. Therefore, some speakers although the marked indicators are very good, it is only in the specific test conditions, and did not take into account the unit under high-power conditions in the serious impact, but also did not consider the vibration of the box (especially the box Resonance) on these indicators. This appears some of the speakers of the technical indicators are good, but the actual listening feeling is not good.

Therefore, to improve the quality of the speaker, it is necessary to study the speaker under normal operating conditions may occur vibration (or resonance) on the speaker technical indicators and subjective sense of hearing. Speaker vibration, mainly refers to resonance. The actual tests show that the vibrations that occur under general nonresonant conditions are small and do not have a significant effect on the system. There are two most important excitation forces that resonate with the speaker. One beats headphones cheap is the resultant force of the electromagnetic force and the unit gravity when the speaker unit is working. It vibrates the front baffle through the basin frame. The other is the sound pressure accumulated in the loudspeaker , It directly stimulates the vibration of all the baffles of the speaker.

The beats by dre sale accumulation of sound waves in the box, easier to be ignored, but the reality is a serious problem. Calculations and actual tests show that the sound pressure accumulated in a loudspeaker with poor sound absorption is much higher than the sound pressure of the loudspeaker unit, for example, 25 dB higher. This powerful sound pressure, speaker box board area is larger, resulting in a great incentive, enough to stimulate the box board serious resonance. And the vibration will pass through the baffle adjacent to it, passing the vibration to the other baffle. In particular, the sound waves accumulated in the box will not only affect the front and rear pressure balance of the diaphragm of the loudspeaker unit, change the resonance state of the diaphragm, but also directly radiate the diaphragm of the loudspeaker unit and interfere with beats by dre on sale the motion of the speaker unit diaphragm The Therefore, as much as possible to reduce the accumulation of sound waves in the box is also an important work.