Pure Tone Audiometry

Pure Tone Audiometry is a standard hearing test of hearing assessment that measures the degree, type, and configuration of hearing loss. It’s a standard method for hearing assessment because it’s easy to perform, reliable, and widely available. It can be used to detect, monitor and reduce the risks posed by noise at work. This non-invasive procedure helps in diagnosing hearing loss, determining its severity, and guiding appropriate treatment options.

How It Works

During the test, a patient listens to pure tones played through headphones and responds by pressing a button when they hear a sound. The test measures the lowest intensity at which a person can hear a tone 50% of the time, known as the threshold. This process is repeated for multiple frequencies and for each ear. The results are plotted on a graph called an audiogram, providing a visual representation of hearing ability.

What It Measures

PTA measures hearing thresholds for specific frequencies, helping to identify the type and configuration of hearing loss. It helps to measure the softest sounds a person can hear at different pitches or frequencies. 

What It Doesn’t Measure

PTA only measures audibility thresholds; it does not assess other aspects of hearing, such as speech recognition or sound localisation.

How It’s Used

PTA is used to diagnose and manage hearing loss, monitor hearing changes over time, and reduce the risks of workplace noise exposure.

• Early Detection of Hearing Loss: PTA helps in identifying hearing issues early, which is crucial for effective intervention.
• Guiding Treatment Plans: It aids audiologists and ENT specialists in recommending hearing aids, cochlear implants, or other medical treatments.
• Monitoring Hearing Health: Regular PTA tests are essential for individuals exposed to noisy environments or those with conditions affecting hearing, like ototoxic medication use.
• Assessing Occupational Health: It is widely used in occupational health to ensure employees meet hearing safety standards.

Who It’s For

PTA is only suitable for adults and children who can cooperate with the test. The test environment, equipment, and sound stimuli are carefully calibrated for accuracy before testing.

• Individuals experiencing hearing difficulties
• People with a history of ear infections or trauma
• Workers in noisy industries
• Children with speech and language delays
• Older adults as part of routine health check-ups

How Long It Takes

A PTA typically takes about 20 minutes to complete.

Frequently Asked Questions