To determine: The people that had best and the worst hearing capacity in the range of 4000-6000 hertz sound frequency.
Introduction: Hearing refers to the perception of sound. The loudness of sound is measured in decibels. The frequency of the sound is measured as number of wave cycles per second or hertz. This determines the pitch of the sound which is directly proportional to 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 the hair cells in the inner ear that may result in a temporary or a permanent hearing loss.
Biology: The Unity and Diversity of Life (MindTap Course List)