ABSTRACT
After reading the following chapter and undertaking personal study, you should be able to:
Identify sound waves as mechanical waves.
Describe the characteristics of longitudinal waves.
Outline the decibel scale for measuring the perceived loudness of sound.
State the importance of wearing hearing protection in noisy environments.
Describe the mechanism of hearing.
Briefly describe the two main forms of deafness.
List some of the important aspects of communicating with someone who has a hearing impairment.
Outline the piezoelectric effect and briefly describe the medical use of ultrasound.
Describe the Doppler effect and outline the medical use of Doppler ultrasound.
