This hearing aid app is designed to help users switch between different modes of the hearing aid, adjust volume, MPO (Maximum Power Output), EQ (Equalizer), and noise reduction level. It also includes a self-test feature for pure-tone audiometry and offers self-fitting based on the test results.

Detailed Description:
This app comes with four preset working modes suitable for home, office, traffic, and restaurant environments. Users can easily select the appropriate mode based on their current surroundings for optimal hearing experience.
The volume adjustment feature offers 10 levels that can be adjusted individually or synchronized between both ears for convenience.
The equalizer allows users to adjust 8 frequency bands at 500Hz, 1kHz, 1.5kHz, 2kHz, 3kHz, 4kHz, 5kHz, and 7kHz, providing personalized sound adjustments.
With 5 levels of MPO adjustment, users can lower the maximum output by up to 10dB, ensuring comfortable listening even in noisy environments.
The app also offers 5 levels of noise reduction, with a maximum reduction of 16dB, enhancing speech clarity in challenging environments. Effectively reducing ambient noise interference and improving clarity of hearing.
Users can conduct pure-tone audiometry tests at frequencies of 250Hz, 500Hz, 1kHz, 2kHz, 3kHz, 4kHz, and 6kHz, with a testing range from 15dB to 90dB. This feature helps users understand their hearing condition. Based on the test results, the app make corresponding adjustments for personalized hearing settings.