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1. Background knowledge:
Main factors affecting voice quality:
2. Standards for testing:
Main standards:
YD/T 1214-2002&YD/T 1215-2002 YD/T 1538-2006
Other relevant standards:
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Recently, the "Belt and Road" International Cooperation Summit Forum will be held in Beijing. Since the initiative was first proposed in 2013, the "Belt and Road" construction has grown from nothing ...[Details]
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Let's first analyze the cause of the noise: Figure 9.29.1 shows a recording automatic level control circuit. D1 and C1 form a peak detection circuit, which converts the audio voltage at the output...[Details]
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Recently, Xuanyuan Intelligent Driving's infrared thermal imaging chip passed the rigorous testing of a third-party authoritative organization and obtained the AEC-Q100 authoritative certification....[Details]
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The development of computer technology and microelectronics technology has provided new methods and approaches for modern electronic design. Traditional electronic design uses independent discrete...[Details]
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There are two types of noise at the output of the switching power supply, differential mode and common mode. At the same time, the measurement of ripple noise is easily affected by random noise i...[Details]
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There are many charging stations near my home now, which makes charging very convenient. I can park my car at a charging station and charge it, and it takes me a while to go home and have a meal. Comp...[Details]
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1 Introduction
Embedded system is the product of the combination of advanced computer technology, semiconductor technology, electronic technology and specific applications in various industrie...[Details]
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Nokia is working with multiple partners to support its ReefShark family of chipsets, which are used in many base stations. On March 5, local time, Nokia announced that it has collaborated with I...[Details]
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What is IGBT
IGBT is
a high-power insulated gate field effect transistor, which is widely used in high-power power supplies or inverters.
1. Basic structure of IGBT
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Multilayer ceramic (MLC) capacitors have become extremely popular in power electronics due to their small size, low equivalent series resistance (ESR), low cost, high reliability, and high ripple...[Details]
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A relay is an electrical control device that can give a specified input and maintain it for a long enough time, causing a predetermined step change in the controlled quantity in the electrical outp...[Details]
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This article provides design guidelines for the optomechanical portion of the MAX25205 and MAX25405 gesture sensors. A key design issue in gesture detection systems based on infrared (IR) technology ...[Details]
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When using Keil, the number of breakpoints cannot exceed 5. If there are more than 5 breakpoints, you will not be able to enter the debugging interface. If more than 5 breakpoints are hit during de...[Details]
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With the industry reshaping driven by technology, the continuous influx of new generations and the emergence of new ideas, the automotive industry and the extension and extension of automobiles as co...[Details]