“AM FM Differences” explores the fascinating reasons behind the continued existence of both AM and FM radio in our increasingly digital world. While seemingly outdated, these analog technologies offer unique benefits that keep them relevant. For instance, AM radio's long-range signal propagation makes it ideal for broadcasting information and emergency alerts, particularly in rural areas, while FM radio delivers superior audio quality, favored for music and local news.

The book examines the underlying principles of amplitude modulation (AM) and frequency modulation (FM), detailing how each affects audio quality and broadcast range. It traces their historical development, highlighting the advantages and disadvantages of each format.

The core of the book is divided into sections dedicated to AM and FM, examining their technology, history, and applications. By understanding these “signal modulation” methods, readers gain insight into the broader landscape of radio technology and broadcasting.

The book concludes with a comparison of AM and FM and their future prospects.