Which statement about the relationship between UCL and fitting software is true?

The statement that individual UCL (Uncomfortable Loudness Level) must be measured to provide the best fit is true because individual variability among patients can significantly impact their comfort levels with sound. Each patient may have different tolerances for loud sounds due to various factors such as hearing loss, sensitivity, and personal preference.

Measuring an individual’s UCL allows the hearing aid fitting specialist to customize the amplification settings to the precise comfort level of that specific patient. This tailored approach results in better patient satisfaction and compliance, as the hearing aids will not exceed the individual's tolerance for loud sounds, leading to a more comfortable listening experience.

In contrast, average UCL values do not account for the unique characteristics of each patient and may lead to settings that are either too loud or too soft, which could cause discomfort or ineffective hearing aid performance. Thus, individual measurements are crucial for achieving optimal hearing aid fittings.