Tympanometry measures should not be interpreted in isolation. Tympanometry is part of a complete test battery and outcomes from other audiological tests should be considered in conjunction with these results.
The following provides a broad interpretation of typical Tympanograms by type and possible related pathologies and are based on Adult Probe Frequency 226Hz.
Typical Normative Data for an Adult (BSA Guidelines 2013)
Admittance / Compliance between 0.3 to 1.6 cm3 (‘Y’ Axis)
Middle Ear Pressure +50 to -50 daPa (Deca Pascal) (‘X’ Axis)
Ear Canal Volume (ECV) 0.6 to 2.5 cm3