Nares,
Mouth,
Pharynx,
Trachea.
Resonance means resounding or sounding again, and is caused by means of
the air conveying the vibrations of one substance to another substance.
This is familiarly illustrated in the echo.
There are two classes of resonant chambers; one class is comparatively
fixed, and consists of the nares and trachea; the other class may, for
convenience, be termed the transient forms of resonance. [2]A transient
resonant chamber is one that is formed on the instant for a particular
purpose, and may be broken as quickly.
Elements of speech are formed by producing a succession of definitely
formed but transient molds of resonance.
The pharynx is for the purpose of reinforcing the tone, giving it
projection and some assistance in proper direction. All the other
transient resonant molds are for the purpose of producing elements of
speech.
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[2] See Tyndall on sound, page 227.
NARES (Nasal cavities).
The nares are the cavities in the head extending through the nose to the
pharynx. The walls of the nares are smooth, and, with their turbinated
bones, suggest the inside of a sea-shell.