How Audiometry Tests Help
Detect Early Hearing Loss

Employees who have to work in workplaces with heavy vehicles and machines may be exposed to loud noises for a long time. Mostly, industries such as manufacturing, construction, and mining have a high risk of occupational hearing loss. Audiometric testing helps organisations and employees to detect hearing loss early and reduce potential health risks.

What Is Noise-Induced Hearing Loss?

Noise-Induced Hearing Loss (NIHL) is permanent hearing damage caused by being exposed to extremely loud impulse noise or high-decibel sounds for a long period.

Unlike physical injuries, workplace hearing loss typically develops gradually over months or years without leaving any bruises. As it happens quietly, without proper monitoring and tests, the damage may worsen and may eventually become permanent.

However, some early symptoms may include:

• Difficulty hearing conversations in noisy environments
• Asking others to repeat themselves more frequently
• Experiencing temporary ringing in the ears after work shifts

Therefore, proper monitoring and regular audiometry tests are important to detect and prevent hearing loss early.

What Are Audiometry Tests?

An audiometry test is a painless medical exam that measures a person’s hearing ability across various frequencies and volumes. This test is used to measure hearing thresholds and identify the signs of hearing loss.

The common audiometry tests are:

Pure-Tone Testing: The person wears headphones that play tones at different frequencies. The person has to signal when he or she hears the faintest tone. This is tested one ear at a time to check a person’s hearing ability.

Speech Audiometry: This test measures a person’s ability to hear speech. The person has to listen to a series of spoken words with different volumes and repeat them. This helps test word clarity and speech comprehension.

How Audiometry Testing Detects Early Hearing Changes

Noise-induced hearing loss in the early stages usually impacts high frequencies first. In other words, people may still feel comfortable during most of the daily conversations which occur at lower frequencies even if they are in the early stages of NIHL. Audiometry tests are designed to detect hearing loss at an early stage.

(i) Record A Hearing Baseline

First, the initial hearing level is tested and recorded as a reference for future audiometric testing.

(ii) Measure Hearing Thresholds

Measure the softest sound a person can hear through proper audiometry tests.

(iii) Identify Early Hearing Changes

Detect small changes in hearing capability before they become noticeable in daily conversations.

(iv) Monitor Hearing In The Long-Term

Regular audiometry tests can help employees monitor gradual changes over time.

(v) Support Early Intervention

If changes in hearing sensitivity are detected early, organisations may strengthen noise controls at the workplace and provide hearing protection for employees.