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Marine Speakers Reliability
Jun 19, 2017

Marine Speakers Definition of reliability and scope of application The definition of loudspeaker reliability is defined as "the ability of the loudspeaker product to complete the specified function within the specified conditions and within the specified time." It is the time quality indicator of the loudspeaker product after it is used to describe the loudspeaker In the course of the use of vulnerable and reliable. Marine Speakers As the requirements of the user increase, the speaker structure is becoming more and more complex (such as car speakers), the output power is getting bigger (such as PA speakers), the use of more and more harsh environment (such as outdoor speakers), will lead to reliable speaker products Sexual level down. At the same time, such as the use of new materials, new technology or new technology, will make the speaker unreliable factors increased.

The reliability of the loudspeaker can also be defined as "the number of failures allowed by the speaker product under specified conditions and within a specified time." Marine Speakers The mathematical expression is the mean time between failures (MTBF). It can be considered that the random failure is unavoidable and acceptable, which also leads to failure due to design reasons or manufacturing process, Marine Speakers as long as within the allowable number, often no longer for further traceability. To this end, as early as 1995 the international community began to define the traditional reliability and random failure can not avoid the old concept of the question, while the reliability of the project began to implement the physical method of failure. In Europe, the use of maintenance-free use (MFOP) instead of the original MTBF, the failure rate of the curve of the curve was broken [21. Therefore, in combination with the failure of physical methods and failure analysis method, it is not a delusion to design a loudspeaker product that does not have random failure. A considerable number of foreign enterprises have already done fruitful work in this area.

The "defined conditions" in the definition of reliability determine a wide range of reliability, and the reliability of the product is of great relevance to the working conditions of the product, the conditions of use, and the environmental conditions for storage and transportation. Conditions can be divided into the use of conditions and the surrounding environment two categories. Conditions of use refers to the internal conditions of the product into the stress conditions, including a variety of electrical stress, Marine Speakers chemical stress and physical stress. Ambient conditions include temperature, humidity, air pressure, harmful gases, mold, salt spray, shock, vibration and radiation and other environmental stress conditions. In this sense, environmental testing is also part of the reliability test category. These stress conditions can be applied separately or in combination, and the effect of the integrated application on the reliability of the loudspeaker product will be more pronounced.

The derating design derivation is designed to allow the key components that have a greater impact on the reliability of the loudspeaker to be designed to withstand stresses that are less than the conventional level by design so as to reduce the basic failure rate. In the speaker system design, Marine Speakers derating design applications are more common. In the speaker unit design, the use of a larger area of the positioning of the film, the larger diameter of the voice coil, lead and lead the plastic design and so on reflect the derating design ideas.

The failure rate of the loudspeaker increases as the operating temperature increases, and the operating temperature must be reduced in order to reduce the failure rate. Henricksen C. A. Theoretically, the heat conduction mechanism of the loudspeaker is discussed [41]. The main reason for the fever of the loudspeaker is that the speaker's working temperature can reduce the heat of the voice coil and improve the heat of the voice coil and the magnetic circuit. The heat of the loudspeaker is as follows: (1) through the core, Marine Speakers positioning pieces, basin frame, paper cone root, voice coil skeleton design through the larvae L to form a cooling channel. Also be careful to prevent poor design noise. (2) the use of magnetic fluid, improve the voice coil cooling capacity. This method can sometimes not be used in conjunction with method (1). (3) the use of black devices, improve the device's thermal radiation and thermal conductivity. (4) in the case of cost, increase the heat sink to heat. (5) For extremely high power and continuous use of the speaker, may need to use oil cooling or water cooling technology to improve reliability. (6) to improve the heat resistance of materials and adhesives. Many speaker designers will instinctively use this approach when they encounter problems, but simply improving the heat resistance of materials and adhesives is not a good idea of reliability. Because the stability of the adhesive and the material may become a speaker to improve the reliability of the uncertain factors. Marine Speakers Of course, the use of rubber or plastic parts, still need to pay special attention to these parts of the temperature or temperature impact tolerance.