System for subglottal pressure measurement and display during speech

摘要

A method and device is described for estimating the subglottal air pressure during speech or singing from the intraoral air pressure in essentially real-time by using a type of peak detection and extrapolation means that holds peaks in the low-pass filtered pressure signal for a period of time sufficient to allow their interpretation as real-time subglottal pressure. An electronic circuit suitable for implementing this function is described.

主权项

1. An apparatus for indicating the air pressure in the lungs during speech or singing comprising:
a pressure transducer for converting air pressure to an electrical signal; a sensing tube for passing the intraoral pressure to said pressure transducer; a low pass filter for receiving said electrical signal from said pressure transducer and removing an acoustic energy from the signal; a peak detection and holding means for receiving the output of said low pass filter and detecting peak values of the output of the low pass filter and holding said peak values, or an approximation of said peak values, for a period of time; a recording or display means for displaying a present value of the output of said peak detection and holding means.