"Theory of Sound" (by John William Strutt)

John William Strutt, also known as Lord Rayleigh, contributed significantly to the understanding of sound through his work "The Theory of Sound." In it, he explored how sound waves travel through different mediums, their properties, and how they can be described mathematically. He examined the nature of vibrations and their role in producing sound, along with the concepts of frequency, pitch, and resonance. His research laid the groundwork for modern acoustics and helped explain phenomena such as sound propagation, echoes, and harmonics, deepening our understanding of how we perceive and interact with sound in our environment.