International Licensing Examination (ILE) Practice Test

What does the CROS, Free Field, and Janssen style allow for in hearing aid fittings?

1. Complete occlusion of the canal

2. Minimization of low frequency amplification

3. Increased sound isolation

4. Enhanced hearing directionality

The correct answer is: Minimization of low frequency amplification

The Janssen style, CROS (Contralateral Routing of Signal), and Free Field configurations are primarily designed to enhance hearing capability by addressing the challenges of sound directionality and spatial awareness rather than simply amplifying sound. Choosing the option related to the minimization of low-frequency amplification reflects a principle in hearing aid fitting where there is a focus on tailoring the amplification to better suit the individual's needs. In certain cases, particularly in hearing aids configured for users with specific hearing loss profiles, minimizing low-frequency amplification can improve overall clarity and the perceived quality of sound, especially in noisy environments. This adjustment helps the wearer to better discern speech from background noise which is often dominated by low frequencies. In contrast, choices discussing complete occlusion of the canal or increased sound isolation would not align with the goals of these fitting styles, which typically aim to preserve some degree of natural ear function and social awareness. Enhanced hearing directionality might seem appealing, but it does not solely hinge on the fitting styles mentioned, as directionality is a broader topic within the fitting and functioning of hearing aids rather than specific to these particular configurations.