crystal radio

简明释义

晶体收音机

英英释义

例句

1.During the science fair, I demonstrated how a crystal radio works.

在科学展上，我演示了水晶收音机是如何工作的。

2.I built a simple crystal radio to listen to AM stations without needing a power source.

我制作了一个简单的水晶收音机，可以在不需要电源的情况下收听AM电台。

3.You can build a crystal radio with just a few basic components.

你只需几个基本组件就能制作一个水晶收音机。

4.My grandfather used to listen to the news on his crystal radio when he was a kid.

我爷爷小时候常常在他的水晶收音机上听新闻。

5.The crystal radio uses a diode to detect radio signals.

这个水晶收音机使用二极管来探测无线电信号。

作文

The invention of the crystal radio marked a significant milestone in the history of communication technology. A crystal radio is a simple type of radio receiver that was popular in the early 20th century. Unlike modern radios, which require a power source, a crystal radio operates without batteries or electricity. It uses a crystal detector to convert radio waves into audio signals, allowing users to listen to broadcasts from various stations. This simplicity and self-sufficiency made the crystal radio an attractive option for hobbyists and young inventors alike.One of the most fascinating aspects of the crystal radio is its design. Typically, it consists of a few basic components: an antenna, a tuning coil, a crystal detector, and headphones. The antenna captures radio waves from the air, while the tuning coil helps select specific frequencies. The crystal detector, often made from a piece of mineral like galena, rectifies the radio signal, and finally, the headphones convert the audio signal into sound. This straightforward mechanism illustrates the ingenuity of early radio technology and highlights how far we have come since then.Building a crystal radio can be an educational project for students and enthusiasts. It provides hands-on experience with electronic components and teaches fundamental concepts of physics and engineering. By constructing a crystal radio, individuals can learn about wave propagation, resonance, and the principles of electromagnetic radiation. Moreover, it fosters creativity and problem-solving skills as builders experiment with different designs and materials to improve reception and sound quality.The crystal radio also has historical significance. During the early 1900s, when radio technology was still in its infancy, many people relied on crystal radios to receive news and entertainment. They were particularly popular during times of war, as they allowed individuals to stay informed about current events without the need for expensive equipment. The accessibility of the crystal radio democratized information and played a crucial role in shaping public opinion during critical moments in history.In addition to its practical uses, the crystal radio has become a symbol of innovation and creativity. Many inventors and engineers began their careers by building crystal radios, inspiring future generations to explore the fields of science and technology. Today, even though digital technology has largely replaced analog systems, the crystal radio continues to be a beloved project among hobbyists and educators. It serves as a reminder of the power of ingenuity and the importance of understanding the basics of technology.In conclusion, the crystal radio is more than just a simple device; it represents a pivotal moment in the evolution of communication. Its design and functionality provide valuable lessons in electronics and engineering, while its historical impact showcases the importance of accessible information. As we continue to advance technologically, the crystal radio remains a cherished artifact of innovation that inspires curiosity and creativity in the world of radio and beyond.

水晶收音机的发明标志着通信技术历史上的一个重要里程碑。水晶收音机是一种简单的无线电接收器，在20世纪初非常流行。与现代收音机需要电源不同，水晶收音机不需要电池或电力。它使用晶体探测器将无线电波转换为音频信号，使用户能够收听来自各个电台的广播。这种简单性和自给自足使得水晶收音机成为爱好者和年轻发明者的理想选择。水晶收音机最迷人的方面之一是它的设计。通常，它由几个基本组件组成：天线、调谐线圈、晶体探测器和耳机。天线从空气中捕获无线电波，而调谐线圈帮助选择特定频率。晶体探测器通常由一块矿物（如方铅矿）制成，用于整流无线电信号，最后，耳机将音频信号转换为声音。这一简单的机制展示了早期无线电技术的聪明才智，并突显了我们自那时以来取得的进步。制作水晶收音机可以成为学生和爱好者的一项教育项目。它提供了对电子元件的动手体验，并教授物理和工程的基本概念。通过构建水晶收音机，个人可以学习波传播、共振和电磁辐射原理。此外，它还培养创造力和解决问题的能力，因为构建者可以尝试不同的设计和材料来改善接收和音质。水晶收音机还有历史意义。在20世纪初，当无线电技术仍处于起步阶段时，许多人依靠水晶收音机获取新闻和娱乐。它们在战争时期尤其受欢迎，因为它们使个人能够在不需要昂贵设备的情况下保持信息灵通。水晶收音机的可及性使信息民主化，并在塑造历史关键时刻的公众舆论中发挥了重要作用。除了实用用途外，水晶收音机还成为创新和创造力的象征。许多发明家和工程师的职业生涯都是通过构建水晶收音机开始的，激励着未来几代人探索科学和技术领域。即使今天，尽管数字技术在很大程度上取代了模拟系统，水晶收音机仍然是爱好者和教育工作者喜爱的项目。它提醒我们创造力的力量以及理解技术基础的重要性。总之，水晶收音机不仅仅是一个简单的设备；它代表了通信演变中的一个关键时刻。它的设计和功能提供了电子学和工程学的宝贵课程，而它的历史影响则展示了信息获取的可及性的重要性。随着我们继续在技术上取得进步，水晶收音机仍然是创新的珍贵遗物，激发着人们对无线电及其他领域的好奇心和创造力。