Pure Tone Audiometry

Comparing thresholds obtained through headphones with those obtained through a bone vibrator helps show how sound detection differs by transmission route. The pattern can indicate whether reduced hearing is conductive, sensorineural, or mixed. This comparison is clinically important because it moves interpretation beyond a single sensitivity measure and helps connect test findings with the likely type of impairment.

An audiogram organizes the softest detected tones across tested frequencies, making frequency-specific hearing sensitivity visible rather than reducing the result to one overall score. The examiner can examine how thresholds change from one frequency to another and compare air- and bone-conduction findings. This visual record supports classification, treatment planning, and monitoring over time.

Frequency identifies the pitch of the test tone, while intensity determines how strong that tone is. Varying both allows the examiner to find the listener’s detection threshold at different tested frequencies. The resulting pattern can reveal whether hearing reduction is limited to particular frequencies or occurs more broadly, information needed for clinical interpretation.

Because the measurement depends on the listener responding whenever a tone is heard, the test is behavioral rather than a purely instrument-based recording. The examiner changes tone frequency and intensity while using those responses to locate the softest detectable level. This design links the audiogram directly to the person’s observed detection behavior and supports behavioral hearing assessment.

Testing presents tones through headphones and may also use a bone vibrator for comparison. The examiner varies frequency and intensity, and the listener responds each time a tone is detected. Thresholds for air and bone conduction are then plotted on an audiogram. These steps produce a structured record that can be interpreted for hearing-loss type and degree.

It can support hearing screening, clinical diagnosis, treatment planning, and monitoring of auditory changes. Its use is relevant when clinicians need to characterize hearing loss rather than simply note that a hearing difficulty exists. Repeated measurements can help track changes associated with disease, aging, or noise exposure and provide information for decisions about ongoing care.

The distinction comes from interpreting the relationship between air- and bone-conduction thresholds on the audiogram. Differences between the two pathways provide evidence about the type of impairment, while the measured threshold levels indicate its degree. Pure Tone Audiometry therefore supplies both a classification pattern and frequency-specific sensitivity data, rather than a single undifferentiated hearing result.