One of the subjects of phonetic research in this Institute for Perception Research is the duration of lip and tongue closure. In the literature several systems for dynamic palatography are described (see references). The aim has been to build a circuit to measure whether the tongue is in contact with a certain region of the surface of an artificial palate and for how long. On this surface a number of pairs 0f small gold contacts were provided which were connected to a corresponding number of circuits outside the mouth by means of thin insulated wires. The contacts will be called here electrodes. The resistance between each pair of electrodes is large when the tissues of the tongue are not in contact with them, and small when there is contact. The circuit described here measures first the resistance between the two electrodes. In most cases it is necessary to operate more than one circuit simultaneously. For this reason each circuit is operated on an individual frequency. The number of circuits which must operate simultaneously is rather small: 4 or 6 (a small number as compared to Fujimura (1968), who used 64 electrodes). Each circuit can also be used with other electrodes (see fig. 3) for measuring lip closures, and possibly more closures of wet tissues.
|Number of pages||3|
|Journal||IPO Annual Progress Report|
|Publication status||Published - 1970|