这里的信号不受干扰！通过将包括一个有磁性的扬声器在内的电子元件连接到一个带有一根天线和几个用于调节音量的按钮的接收器模块，设计一个真正的能用的FM收音机。接着，用书中的任何一个游戏来测试你做好的收音机和音乐知识。雄心勃勃的有音频头脑的小朋友将了解电磁频谱、无线通信以及无线电波如何成为他们耳中的音乐。

No jammed signals here! Engineer a real, working FM radio by connecting electronic components, including a magnetic speaker, to a receiver module with a working antenna and buttons for tuning and volume. Then put your finished radio and music knowledge to the test with any of the games in the book! Aspiring audio heads will learn about the electromagnetic spectrum, wireless communications, and how radio waves become music to their ears.