Recommendations

1. Recommendations for the enrollment process

• The secret phrase must be phonetically rich.

• The secret phrase must never be a repetition of words.

• The secret phrase must be spoken in the user's natural tone (*).

(*) The registration should not be carried out if the user has a cold or in environments where audio is restricted.

2. Best practices

The registration should be updated every two years due to the natural change in the voice.

3. Situations that reduce the system's reliability

The following conditions significantly affect the algorithm:

• Aggressive audio compression.

• Noise-canceling hardware.

• Downsampling of frequencies below 16 kHz.