and then they
pronounce a _Breath which is simple, but not Sonorous_. Deaf Men also
do know a _Voice_ to be different from a _Simple Breath_; for they can
speak both ways, and I also have learned this Distinction partly from
them.

The Humane _Voice_ is Air, impregnated, and made Sonorous by the
impressed Character of the Life, or is such, as whilst it is in
breathing forth, doth smite upon the Organs of the _Voice_, so, as
_they tremble thereupon_; for indeed, without this tremulous Motion,
no _Voice_ is made: Yea, not only the _Larynx_, or Wind-pipe, doth
thereupon tremble, but the whole Skull also; yea, and sometimes _all
the Bones_ _of the whole Body_, which any one may easily find in
himself, by his applying his Hand to his Throat, and laying it on the
top of his Head. This trembling is very perceptible in most sounding
Bodies, and is (if I mistake not) owing for the most part to the
_Springiness_ of the Air; which, did I not study to be brief, I could
more fully explicate. Now the _Simple Breath_ is Air, breathed forth
by the opening of the Mouth or Nostrils, simply, and without any
smiting on the parts, which rather exciteth a whispering than a sound.
Hence is it, that Animals, whose Wind-pipe is cut beneath the Throat,
do indeed render a _Breathing_, but no _Voice_; for the Tube of the
Wind-pipe is too large, and too smooth, than that the Air can strike
upon it any where; and being thus reflected on its self, it can also
imprint a tremulous Motion on its neighbouring Bodies: This the
Physicians Pupils do know; who being about to dissect live Dogs, they
cut their Throats, that they may not be troubled with their barking:
For _Voice_ differs as much from a _Simple Breath_, as doth that
hoarse Sound, which we excite, by rubbing the tops of our Fingers hard
upon some Glass or Table, which is quite differing from that same
_soft whistling Sound_, which is heard when we lightly rub with the
Hand the same Glass or Table.

The _Voice_ therefore, as it is the _Voice_, is generated in the
_Cartilages of the Wind-pipe_, then afterwards is formed into such or
such _Letters_; but that it may become a lovely _Voice_, it's
requisite, that those Cartilages be _smooth_, and _lined with no
mucous Matter_, else the _Voice_ will become Hoarse, and sometimes be
utterly lost, viz. when they have lost their Springy power.

For _Pipes_; and other _Wind-Instruments_ do most notably explain to
us the nature of the _Voice_; for in th