Which of the following is NOT a configuration found on an audiogram?

On an audiogram, the common configurations reflect the way hearing sensitivity varies across different frequencies. These configurations help audiologists interpret the degree and type of hearing loss a patient may have.

The configurations labeled as normal, flat, and rising are well-established in audiometric analysis. A "normal" configuration indicates that hearing thresholds fall within the typical range across frequencies. A "flat" configuration shows that hearing sensitivity is relatively consistent across all frequencies, while a "rising" configuration indicates better hearing at higher frequencies compared to lower ones.

However, "complex" is not a standard term used to describe a configuration on an audiogram. The term implies a more intricate and undefined pattern of hearing loss that does not fit neatly into the established categories. Thus, the presence of complex as an option distinguishes it from the other recognized configurations, confirming that it is not a type typically seen on an audiogram. This understanding is crucial for accurately interpreting audiograms in clinical settings.