Heppt W, Westrich M, Strate B, Möhring L
Universitäts-Hals-Nasen-Ohrenklinik Heidelberg.
Laryngorhinootologie. 1991 Apr;70(4):208-13.
None of the methods described in the literature on the objective analysis of nasality has so far been introduced in routine diagnosis. The present study describes initial experiences with the nasometer in german language and presents nasalanz as a new term for objective analysis of nasality in german-speaking countries. Typical cases are demonstrated via a rhinophonia test designed for the use of the nasometer. Results obtained in 75 subjects show that nasalanz provides a valid parameter of objective measurement of closed and open rhinophonia and emphasize the value of the nasometer in follow-up studies of surgery as well as in biofeedback therapy of patients suffering from rhinophonia. Fundamental aspects of nasality with reference to the obtained results are discussed.