ACtE08 · Chapter 8Mock Test 03🏛️ Past Licensure QuestionID: a71f35f1
What kind of signal is primarily captured and processed in speech recognition systems?
What kind of signal is primarily captured and processed in speech recognition systems?
Multiple Choice Options
- A
Electromagnetic signal
- B
Electric signal
- C✓ Correct Option
Acoustic signal
- D
Radar
Detailed Technical Solution & Explanation
Speech recognition captures longitudinal mechanical pressure waves generated by the human vocal tract—which are Acoustic signals—converted via microphones into digital audio signals for spectral analysis.
Option Analysis:
•
Option A (Electromagnetic signal): Radio/optical waves.
•
Option B (Electric signal): The intermediate transducer voltage, but speech itself is fundamentally an acoustic signal.
•
Option C (Acoustic signal): Correct. Physical sound wave phenomenon captured for speech recognition.
•
Option D (Radar): Radio detection and ranging.
Reference: Mock Test 03NEC Licensure Syllabus