Audiometry
The clinical evaluation and quantitative measurement of human hearing sensitivity across pure tone sound frequencies.
Governing formula
Hearing Level dB HL = 20 log₁₀(P_measured / P_reference)
SI unit
dB HL (Decibels Hearing Level) & Hz
In depth
Tests pure tone air and bone conduction thresholds from 125 Hz to 8,000 Hz. Audiograms plot hearing loss relative to standardized normal human hearing threshold baselines.
Examples in the real world
Audiogram diagnostic curves identifying high-frequency noise-induced hearing loss.