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.
The textbook is known for how acoustical concepts have been made understandable for all students, not just those who are already grounded in mathematics and physics. The book is appropriate for undergraduate courses in acoustics for speech and hearing and hearing science, as well as related courses in audiology.
New to the Fourth Edition
- New chapter on room acoustics (Chapter 10) summarizes relevant concepts for classrooms as well as discusses principles and methods for assessing speech intelligibility/understanding
- Chapter 3 on acoustic impedance is now a freestanding chapter
- Each chapter includes Practice Problems
- Several other chapters have been reorganized to achieve an improved focus and more logical flow of concepts
- Now includes a Glossary of key terms
- Information has been made more concise
- Access to a PluralPlus companion website that includes resources for both students (practice problems) and instructors (PowerPoint lecture slides and related links)
About The Author
Charles E. Speaks, PhD, is a Distinguished Morse-Alumni Professor Emeritus in the Department of Speech-Language-Hearing Sciences at the University of Minnesota. He received his Bachelor of Science and Master of Arts degrees from Ohio University and his PhD degree from the University of Michigan. He taught an undergraduate/graduate-level course in acoustics at the University of Minnesota for 39 years and developed an undergraduate course on the physics and biology of spoken language. Dr. Speaks was awarded a Distinguished Teacher Award by the College of Liberal Arts in 1977 and a Horace T. Morse-Minnesota Alumni Association Award for Outstanding Contributions to Undergraduate Education in 1997, and he was inducted into the University of Minnesota Academy of Distinguished Teachers in 1999. Dr. Speaks also was awarded the Honors of the American Speech-Language-Hearing Association in 2002.
Table of Contents
Chapter 1. The Nature of Sound Waves
Properties of the Transmitting Medium
Properties of the Sound Source
Sound Source Acting on a Medium
Fundamental Physical Quantities
Derived Physical Quantities
Vibratory Motion of a Spring-Mass System
The Pendulum: An Example of Slow-Motion Vibration
Proportionality
Sound Wave Propagation
Types of Wave Motion
Sound Waves
Transfer of Energy
Notes
Frequently Misunderstood Concepts
Practice Problems
Chapter 2. Simple Harmonic Motion
The Waveform
The Concept of Simple Harmonic Motion
Dimensions of the Sine Wave
Notes
Frequently Misunderstood Concepts
Practice Problems
Chapter 3. Acoustic Impedance
Review of Simple Harmonic Motion
Damping
Acoustic Impedance
Summary
Notes
Practice Problems
Chapter 4. Logarithms and Antilogarithms
The Concept of Logarithms and Antilogarithms
Scales of Measurement
More on Exponents
Antilogs and Logs
Procedures for Solving Log and Antilog Problems
Notes
Practice Problems
Chapter 5. Sound Intensity and Sound Pressure: The Decibel
Absolute and Relative Measures of Acoustic Power
Sound Intensity
The Decibel
Sound Pressure
The Relation Between dB IL and dB SPL
Units of Measure for Pressure
Conversion from One Reference to Another
Combining Sound Intensities from Independent Sources
Summary of Decibels for Sound Intensity and Sound Pressure
Notes
Frequently Misunderstood Concepts
Practice Problems
Chapter 6. Complex Waves
Fourier’s Theorem
Periodic Waves
Aperiodic Waves
Waveform and Spectrum
Examples of Complex Sound Waves
Measures of Sound Pressure for Complex Waves
Signal-to-Noise Ratio in dB
Notes
Frequently Misunderstood Concepts
Practice Problems
Chapter 7. Resonance and Filtering
Resonance
Resonance and Filter Curves
Acoustic Impedance and Resonance
Frequency-Selective Systems: Filters
Parameters of a Filter (System Transfer Function)
Idealized Rectangular Filter
Types of Filters
Specification of Level at the Output of Filters
Another Look at Selected Types of Noise
Notes
Frequently Misunderstood Concepts
Practice Problems
Chapter 8. Distortion
Frequency Distortion
Amplitude Distortion
Transient Distortion
Practice Problems
Chapter 9. Sound Transmission
A Free, Unbounded Medium
The Inverse Square Law
Reflection
Refraction
Diffraction
Other Phenomena in Sound Transmission
Notes
Frequently Misunderstood Concepts
Practice Problems
Chapter 10. Room Acoustics
Absorption
Absorption and Reflection
Room Acoustics
Speech Intelligibility: An Overview
Psychophysical/Behavioral Assessment of Speech Understanding
Physical/Predictive Assessment of Speech Understanding
The Design/Redesign Team
A Closing Comment
Notes
Practice Problems
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