thermal noise

简明释义

热噪声

英英释义

例句

1.Researchers study thermal noise 热噪声 to improve the accuracy of quantum measurements.

研究人员研究 热噪声 thermal noise 以提高量子测量的准确性。

2.To minimize thermal noise 热噪声, engineers often use cooling techniques in their designs.

为了最小化 热噪声 thermal noise，工程师们通常在设计中使用冷却技术。

3.In electronic circuits, thermal noise 热噪声 can limit the performance of sensitive amplifiers.

在电子电路中，热噪声 thermal noise 会限制灵敏放大器的性能。

4.The thermal noise 热噪声 in a resistor is proportional to its temperature and resistance.

电阻器中的 热噪声 thermal noise 与其温度和电阻成正比。

5.In radio receivers, thermal noise 热噪声 can affect signal clarity and reception quality.

在无线电接收器中，热噪声 thermal noise 会影响信号清晰度和接收质量。

作文

Thermal noise, also known as Johnson-Nyquist noise, is a fundamental concept in physics and engineering that refers to the random fluctuations in voltage or current that occur in electronic devices due to the thermal agitation of charge carriers, such as electrons. This phenomenon is particularly significant at higher temperatures, where the kinetic energy of the particles increases, leading to greater movement and, consequently, more noise. Understanding thermal noise (热噪声) is crucial for engineers and scientists, especially when designing sensitive electronic equipment like amplifiers and radio receivers.The origins of thermal noise (热噪声) can be traced back to the principles of thermodynamics. As temperature rises, the energy of the atoms within a conductor increases, causing electrons to move more vigorously. This random motion results in voltage fluctuations that can interfere with the performance of electronic circuits. For this reason, devices operating in high-temperature environments or those requiring precise measurements must account for thermal noise (热噪声) to ensure accurate readings and optimal functionality.One of the most common applications of understanding thermal noise (热噪声) is in the field of telecommunications. In radio frequency systems, thermal noise (热噪声) can limit the minimum detectable signal level. Engineers often use various techniques to mitigate the effects of thermal noise (热噪声), such as cooling components to lower their temperature, thereby reducing the noise generated. Additionally, advanced signal processing techniques can help distinguish between the actual signal and the noise, allowing for clearer communication.In audio electronics, thermal noise (热噪声) also plays a significant role. For instance, in high-fidelity sound systems, the presence of thermal noise (热噪声) can affect the clarity and quality of the audio output. Audiophiles and sound engineers often seek to minimize this noise through careful selection of components, such as resistors and capacitors, which can contribute to thermal noise (热噪声) levels. By choosing low-noise components and optimizing circuit design, they can achieve a cleaner sound with less interference from unwanted noise.Moreover, in the realm of scientific research, particularly in fields like quantum mechanics and astrophysics, thermal noise (热噪声) can influence experimental outcomes. Researchers must consider thermal noise (热噪声) when conducting experiments at very low temperatures, where the effects of thermal fluctuations can significantly impact the results. Understanding how to manage thermal noise (热噪声) is essential for achieving precise measurements and reliable data.In conclusion, thermal noise (热噪声) is an inherent aspect of electronic systems that arises from the thermal motion of charge carriers. Its implications are far-reaching, affecting everything from telecommunications to audio engineering and scientific research. By grasping the principles behind thermal noise (热噪声) and implementing strategies to mitigate its effects, professionals in various fields can enhance the performance and reliability of their technologies. As we continue to advance in technology, the understanding of thermal noise (热噪声) will remain vital in pushing the boundaries of what is possible in electronic design and application.

热噪声，也被称为约翰逊-奈奎斯特噪声，是物理和工程学中的一个基本概念，指的是由于电荷载流子（如电子）的热运动而发生在电子设备中电压或电流的随机波动。这种现象在高温下尤其显著，因为粒子的动能增加，导致运动加剧，从而产生更多的噪声。理解热噪声对于工程师和科学家至关重要，尤其是在设计敏感的电子设备，如放大器和无线电接收器时。热噪声的起源可以追溯到热力学的原理。当温度升高时，导体内的原子能量增加，导致电子更加剧烈地移动。这种随机运动导致电压波动，可能干扰电子电路的性能。因此，在高温环境中运行的设备或需要精确测量的设备必须考虑热噪声以确保准确读取和最佳功能。理解热噪声的一个常见应用是在电信领域。在射频系统中，热噪声可能限制最低可检测信号级别。工程师通常使用各种技术来减轻热噪声的影响，例如冷却组件以降低其温度，从而减少产生的噪声。此外，先进的信号处理技术可以帮助区分实际信号和噪声，从而实现更清晰的通信。在音频电子设备中，热噪声同样扮演着重要角色。例如，在高保真音响系统中，热噪声的存在会影响音频输出的清晰度和质量。音响爱好者和音响工程师通常寻求通过仔细选择组件（如电阻器和电容器）来最小化这种噪声，这些组件可能会对热噪声水平产生影响。通过选择低噪声组件和优化电路设计，他们可以实现更干净的声音，减少来自不必要噪声的干扰。此外，在科学研究领域，特别是在量子力学和天体物理学等领域，热噪声可能影响实验结果。研究人员在进行极低温度实验时必须考虑热噪声，因为热波动的影响可能会显著影响结果。理解如何管理热噪声对于获得精确测量和可靠数据至关重要。总之，热噪声是电子系统固有的一个方面，源于电荷载流子的热运动。它的影响深远，影响从电信到音频工程再到科学研究的方方面面。通过掌握热噪声背后的原理并实施减轻其影响的策略，各个领域的专业人士可以提高其技术的性能和可靠性。随着我们在技术上不断进步，对热噪声的理解将在推动电子设计和应用的可能性边界方面继续发挥重要作用。