'audiogram' originates from a modern formation combining Latin 'audīre' (to hear) and Greek 'gramma' (something written).

'audiogram' was formed in medical/technical usage in the 20th century from the combining form 'audio-' plus the suffix '-gram' and became the standard term in audiology for a written record of hearing.

Initially it meant 'a written record or tracing of hearing,' and over time it has maintained that specialized meaning in medical contexts.