Why do computer speakers hiss
Electromagnetic interference can be mainly divided into power transformer interference and stray electromagnetic interference. Generally speaking, the power transformer interference is caused by the power of the multimedia speaker magnetic flux leakage, in conditions allow for transformer shield effect is very obvious, can maximize the magnetic flux leakage blocking, type shield can only use iron materials. We should try our best to choose the products with strong brands and solid materials. Besides, using external transformer is also a good solution
In many cases, there are murmurs of the computer sound, such as the sound box being disrupted, the interface or the connection line, the sound quality is worse. In general, computer audio is active speakers more, its internal amplifier will exist, so the noise is inevitable, the active speakers according to the source can be roughly divided into electromagnetic interference noise, mechanical noise and thermal noise, etc.
In addition, some computer speakers, when the volume is too loud, can also make noise. This kind of situation because of the power amplifier output power may be small, cannot avoid the music instantly as a result of large dynamic peak signal or because of the loudspeaker distortion caused by overload. In response to your question, I can only answer so much, I am always in love HIFI BBS resident, if there is any doubt, please go to love HIFI stereo BBS expert edition to find me.
Also should pay attention to, if the potentiometer to use for a long time, the metal brush will be because of the dust accumulation between diaphragm and wear problems such as poor contact, rotates can produce noise. If the screw of the speaker is not tight, the inverter is not in place, and the machine noise will be generated when the big dynamic music is played. Can deal with the thermal noise by changing the low noise components or reduces the working load of the element method, in addition, lower working temperature is one of effective methods.
Stray electromagnetic interference is more common, and the sound box leads, the divider, the wireless device, or the computer host will be the source of the disturbance. Keep the main speakers as far away from the computer as possible, and reduce the peripheral wireless devices. Mechanical noise is specific to the source. Power transformer in the process of work, the alternating magnetic field caused by the core vibration can produce mechanical noise, it is very similar to the fluorescent lamp ballasts are humming. Choosing a quality product is still the best way to prevent the noise. In addition, we can add rubber cushioning layer between transformer and stationary plate.
