Biology: The Unity and Diversity of Life (MindTap Course List)
Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 33, Problem 4DAA
Summary Introduction

To determine: Whether the hearing decline in the 50-year old carpenter was caused by age or by job-related noise exposure.

Introduction: Hearing refers to the perception of sound. The loudness of sound is measured in decibels. The frequency of sound is measured as the number of wave cycles per second or hertz. The range of frequency that can be heard by human ears is 20-20,000 hertz. The hearing ability of individuals varies depending on their age, gender, and occupation. Continuous exposure to loud noises can damage hair cells in the inner ear that may result in a temporary or permanent hearing loss.

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