TYPICAL SAMPLING FREQUENCIES
IN SPEECH RECOGNITION

• 8 kHz: Popular in digital telephony. Provides coverage of first three formants for most speakers and most sounds.
  
  
• 16 kHz: Popular in speech research. Why?
  
  
• 6.67 kHz: Why?
  
  
• Sub 8 kHz Sampling: Can aliasing be useful in speech recognition? Hint: Consumer electronics.