The characteristics of a speech signal that are exploited for various applications of speech signal
processing to be discussed later in this section on speech processing (e.g., coding, recognition, etc.)
arise from the properties and constraints of the human vocal apparatus. It is, therefore, useful in
the design of such applications to have some familiarity with the process of speech generation by
humans. In this chapter we will introduce the reader to (1) the basic physical phenomena involved in
speech production, (2) the simplified models used to quantify these phenomena, and (3) the digital
implementations of these models....