International Licensing Examination (ILE) Practice Test

Which of the following is true about power (double) domes?

1. They can handle only low frequency sounds

2. They allow for a flexible adjustment of frequencies

3. They are designed for higher gain fittings

4. They do not fit well in smaller ear canals

The correct answer is: They are designed for higher gain fittings

Power (double) domes are designed specifically for higher gain fittings, which makes this statement accurate. These domes feature a larger surface area and a more open design than regular domes, allowing for enhanced amplification of sound frequencies. This capability is particularly beneficial for individuals with significant hearing loss who require additional support to hear effectively across a range of frequencies. The reference to higher gain emphasizes their function in hearing aids that aim to provide increased sound intensity. This is critical for accommodating various hearing loss levels, as individuals with more profound losses often need devices that can deliver stronger amplification without compromising sound quality. While it may also be true that power domes can provide flexibility in terms of sound management, the primary characteristic that defines them is their suitability for higher gain applications. This distinction also helps clarify why they may not be the best choice for all users; individuals with milder hearing loss or those with smaller ear canals may not benefit from the same level of amplification and may require different styles or sizes of domes.