AI in Voice Biometrics Authentication Quiz

Answers and explanations appear as you take the quiz.

1. What is a 'voiceprint' in a voice biometrics system?
   • An audio recording of the user's passphrase
   • A compact numeric template of features extracted from the voice
   • A written transcript of what the user said
   • A picture of the sound wave printed on paper
2. How does text-independent verification differ from text-dependent?
   • It only works in English
   • It requires the user to type their password
   • It verifies the speaker from free-flowing natural speech, not a fixed phrase
   • It identifies the words spoken instead of the speaker
3. How does the goal of voice-biometric comparison differ from ASR?
   • It compares speaker-related identity features instead of transcribing the spoken words
   • It translates each spoken sentence into another language
   • It generates a new waveform from a written prompt
   • It measures only the recording's duration
4. Which technique is commonly used to compare two voice embeddings?
   • Spell-checking the transcript
   • Counting the number of words
   • Measuring the file size of the audio
   • Cosine similarity or PLDA scoring against a threshold
5. Why do replayed and AI-cloned voices matter when evaluating voice-biometric security?
   • A system may accept an attack recording unless its defenses distinguish it from a genuine presentation
   • A high speaker-similarity score proves the recording is live
   • Voice cloning guarantees all speaker systems fail identically
   • Ordinary transcription accuracy measures spoof resistance completely
6. What can on-device voice-template matching establish about privacy by itself?
   • It proves no audio or template can ever leave the device
   • It may reduce transmission, but the actual capture, storage, and upload behavior still needs checking
   • It removes every need for data protection
   • It guarantees backups and telemetry contain no biometric information
7. What is the enrollment reference used for in a voice-verification comparison?
   • It is the written transcript that ASR must reproduce exactly
   • It replaces all future microphone recordings
   • It guarantees that every later matching score is correct
   • It supplies the stored template against which a new probe recording is scored
8. Under NIST SP 800-63B-4's digital-authentication framework, how is voice-based biometric comparison treated?
   • It is mandatory for every authentication level
   • It is automatically approved whenever processing is local
   • It is prohibited within that framework
   • The document declares every worldwide speaker-recognition use illegal