What is the classification of mixed hearing loss regarding Tympanogram?

Mixed hearing loss typically results from a combination of conductive and sensorineural hearing loss. In a tympanogram, which measures middle ear function through the mobility of the tympanic membrane and the acoustic transmission in the middle ear, a flat or abnormal shape indicates issues with the conductive components of the ear, such as the middle ear space or the ossicular chain.

This abnormal tympanogram reflects the presence of both conductive problems (affecting the outer or middle ear) and sensorineural issues (affecting the inner ear or auditory pathway), which together contribute to the mixed hearing loss classification. A flat tympanogram suggests that there is little or no movement of the tympanic membrane, often due to fluid in the middle ear or other obstructions, justifying the classification associated with mixed hearing loss.

On the other hand, normal shaped tympanograms would typically indicate normal middle ear function, while highly compliant tympanograms and peaked tympanograms could indicate specific types of conductive hearing loss, but do not adequately represent the complexities associated with mixed hearing loss.