It is found within the maxillary bone (cheek bone).

The inner end of the line marked _Nasal cavity_ locates it.] TIMBRE The minute differences in these physical conditions, coupled with the subtler differences in the psychical elements of the personality, account for that distinctive physiognomy of the voice called =timbre=, which is only another name for individuality as exhibited in each person.

The same general elements enter into the composition of all voices, from the basso profundo to the high soprano.
That the reader may better understand the proportion and relations of the different parts of the vocal apparatus, a sectional drawing of the head is here produced, showing the natural position of the vocal organs at rest.

As the drawing represents but a vertical section of the head the reader should note that the sinuses, like the eyes and nostrils, lie in pairs to the right and left of the centre of the face.

The location of the maxillary sinuses within the maxillary or cheek bones cannot be shown in this drawing.
The dark shading represents the cavities of the throat, nose, and head.