Companion Website

Welcome to Plural Publishing's companion website, intended to enhance your use of the text Introduction to Sound, Fourth Edition by Charles E. Speaks.

About the Book

The beloved classic textbook, Introduction to Sound: Acoustics for the Hearing and Speech Sciences, is back in a new fourth edition and continues its aim to teach fundamental concepts of acoustics to students in communication sciences and disorders and related disciplines. Students in speech, language, and hearing science must have a thorough understanding of the elements of acoustics before they can successfully embark on more advanced study of both normal and disordered human communication.

Contact Us

We invite your reactions to both Introduction to Sound, Fourth Edition and this site. Please feel free to call Plural Publishing, Inc. at 858-492-1555 with your questions and your suggestions for improving the book and the companion website. Additionally, do not hesitate to email us at if you need help or have comments to pass along. Please include the phrase "Introduction to Sound" in the subject line of your e-mail message(s). We look forward to hearing from you!