Other iTunes stores are available by simply changing the country code behind "http://itunes.apple.com/..."
This is hearing help for:
Hearing help is a quite powerful program that is intended as a hearing aid as well as for ear training.
Hearing help strengthens the microphone signal of your iPhone, iPod or iPad and processes it in a way that individual hearing deficiencies are corrected as best as possible. For this purpose, hearing help includes the following modules:
Hearing help: Hearing aid and hearing training for iPhone & Co
16-band filter audiogram according to DIN EN ISO 8253
16-band equalizer + / - 15 dB
Frequency band choke to avoid listening fatigue and hearing loss at overdriven frequencies
Dynamic compressor to avoid listening fatigue and hearing loss due to a high volume because of e.g. sound events close to the microphone
Real-time noise filter to reduce noise such as from the iPod's microphone
The sound processing is done almost in real time without disturbing echoformation. The filtering is absolutely linear phase using a modified proprietary algorithm (patent DE4224842A1, Peer Dahl).
Operation manuals
Please read one of these manuals before using the app.
English:
PDF-version, to view this you need an acrobat reader: