David Norris, an engineering student, has been working in a nightclub to earn money to pay for his education. After about eight months, he notices that he is having problems hearing high-pitched tones. What is the likely cause-and-effect relationship here?

Name: Human Anatomy & Physiology
Author: Marieb, Hoehn
ISBN: 9780136874034

Verified step by step guidance

Step 1: Identify the key issue described in the problem, which is difficulty hearing high-pitched tones after prolonged exposure to a nightclub environment.

Step 2: Understand that exposure to loud noises, such as music in a nightclub, can damage the hair cells in the cochlea of the inner ear, which are responsible for detecting sound frequencies, especially high-pitched sounds.

Step 3: Recognize that this damage leads to noise-induced hearing loss, a common cause of difficulty hearing high-frequency sounds.

Step 4: Explain the cause-and-effect relationship: prolonged exposure to loud music (cause) damages the cochlear hair cells (effect), resulting in reduced ability to hear high-pitched tones.

Step 5: Conclude that the likely cause of David's hearing problem is noise-induced damage to the auditory system from his work environment.

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Noise-Induced Hearing Loss (NIHL)

Noise-Induced Hearing Loss occurs when prolonged exposure to loud sounds damages the hair cells in the inner ear, leading to difficulty hearing high-frequency sounds. This condition is common among individuals exposed to loud environments, such as nightclubs or construction sites.

High-Frequency Hearing Loss

High-frequency hearing loss refers to the reduced ability to hear sounds in the higher pitch range, often the first sign of auditory damage from noise exposure. It affects the perception of consonants and clarity in speech, making it harder to understand conversations in noisy settings.

Occupational Noise Exposure

Occupational noise exposure involves being subjected to loud sounds during work hours, which can accumulate over time and cause hearing damage. Nightclub workers, like David, are at risk due to constant exposure to loud music without adequate hearing protection.