Diving

This investigation presents the development of an acoustical model
for the study of the reaction of a diving mask on the human vocal
tract. The vocal tract and mask cavity are approximated by simplified
acoustic elements of uniform geometry within which undamped
plane wave motion is assumed. Equations for the impedance at the
mouth opening both with and without a theoretical mask cavity are
developed from the one-dimensional wave equation. The results are
compared with an analysis of the same system using the lumped parameter
technique. The impulse response of the mouth opening is
found by numerical methods and the extension of the technique to
the study of theoretical and actual diving masks is discussed.