RNN Amplifier

[WARNING !]
If you use a sound amplifier without a doctor's prescription, your hearing can get worse.
Be sure to plug-in your earphone or pair your bluetooth headset with your mobile phone before starting the app.

AlgorKorea's hearing aid firmware & app development technology created Personal Sound Amplifier (PSA) app that performs microphone & receiver calibration, includes all of the same four features as a smart hearing aid. The Personal Sound Amplifier app produces loud volume for profound hearing loss.

Noise Reduction based on RNN(Recurrent Neural Network) algorithm is the main features of AlgorKorea sophisticated Personal Sound Amplifier app. RNN algorithms is implemented in real-time with high sound quality for hearing impairments.

RNN Noise Reduction is to take a noisy signal and remove as much noise as possible while causing minimum distortion to the speech of interest.
This algorithm has a combinition of traditional signal processing and Neural Network, which results a strong noise reduction.

The output audio level may be slightly different based on mobile phone’s volume settings, microphone and earphone/headset types.

This app is optimized for Android version 8.1 (API 27) and higher versions. It may work in some phones with lower android version.
Please make sure it works on your phone during the trial period. 
If it does not work properly in versions below 8.1, selecting 'Normal' instead of the default 'Low Latency' in [Settings> Advanced option> Performance] may work.
On Android versions lower than 8.1, [Settings > Advanced option > Audio API] is automatically selected as 'OpenSL ES'. The things to remember in 'OpenSL ES' mode are as follows:
-When ‘OpenSL ES’ is selected as 'Audio API', it is recommended to use earphones with no built-in microphone or Bluetooth earphones/headsets.
-When ‘OpenSL ES’ is selected as 'Audio API', if the earphone with a built-in microphone is used, the microphone of the earphone is used.