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Chapter 4
Hearing, Auditory Models, and Speech
Perception
听觉,听觉模型与语音感知
1
Topics to be Covered
• The Speech Chain (语音链) – Production and
Human Perception
• Auditory mechanisms ( 听觉机理)— the human
ear and how it converts sound to auditory
representations
• Speech perception (语音感知) and what we
know about physical and psychophysical
measures of sound
• Auditory masking ( 听觉掩蔽)
• Sound and word perception in noise
2
Auditory Mechanisms
3
Speech Perception
• understanding how we hear sounds and how we
perceive speech leads to better design and
implementation of robust and efficient systems for
analyzing and representing speech
• the better we understand signal processing in the
human auditory system, the better we can (at least in
theory) design practical speech processing systems
– speech and audio coding (MP3 audio, cellphone speech)
– speech recognition
• try to understand speech perception by looking at the
physiological models of hearing
4
The Speech Chain
• The Speech Chain comprises the processes of:
– speech production,
– auditory feedback to the speaker,
– speech transmission (through air or over an electronic communication
system) to the listener, and
5
– speech perception and understanding by the listener.
The Speech Chain
• The message to be conveyed by speech goes through five
levels of representation b
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