What should I do if there is electric sound in professional audio equipment

　　How to solve the problem of current sound in professional audio equipment? Many situations will cause noise in the audio, such as speakers being interfered, poor connection of interfaces or cables, poor quality of the audio itself, and so on. Generally speaking, speakers are mostly active speakers, and there must be an amplifier inside, so noise is inevitable. The noise of active speakers can be roughly divided into electromagnetic interference, mechanical noise and thermal noise according to the source.

　　Speaker problems cause:

　　1. Electromagnetic interference

　　Electromagnetic interference can be mainly divided into power transformer interference and stray electromagnetic wave interference.

　　1. Power transformer interference

　　Due to the magnetic leakage of the power supply of professional audio speakers, the effect of installing a shielding cover for the transformer when conditions permit is very obvious, which can block the magnetic leakage to the greatest extent. The shielding cover can only be made of iron-type materials. We should try our best to choose products with big brands and solid materials. In addition, using an external transformer is also a good solution.

　　2. Stray electromagnetic interference

　　More commonly, speaker wires, crossovers, wireless devices, or computer hosts will all become sources of interference. Keep the professional audio main speakers away from the computer host as far as possible under permitted conditions, and reduce peripheral wireless devices.

　　2. Mechanical noise

　　Mechanical noise is unique to active speakers. During the working process of the power transformer, the vibration of the iron core caused by the alternating magnetic field will produce mechanical noise, which is very similar to the buzzing sound of the fluorescent lamp ballast. Choosing good quality products is still the best way to prevent this noise. In addition, we can add a rubber damping layer between the transformer and the fixed plate.

　　3. Thermal noise

　　If the potentiometer is used for a long time, there will be poor contact between the metal brush and the diaphragm due to dust accumulation and wear, and noise will be generated when rotating. If the screws of the speaker are not tightened, the inverter will not be handled properly, and mechanical noise will also be generated when playing big dynamic music. This kind of thermal noise can be dealt with by replacing low-noise components or reducing the work load of components. In addition, reducing the operating temperature is also one of the effective methods. In addition, some computer speakers may cause noise when the volume is adjusted too high. This situation is because the output power of the power amplifier may be small, and the large dynamic peak signal at the moment of music cannot be avoided, or it is caused by many situations that cause noise in the speaker, such as professional speakers being interfered, the interface or the connection line is not well connected, The speakers themselves are of poor quality and so on.

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