Should nasal consonants (periods during which there is an oral closure and no velopharyngeal closure) be included in measurements of average nasalance?
Mixing of nasal consonants and vowels in a nasalance reading is theoretically incorrect. Nasalance is only properly defined during vowels and vowel-like consonants, when the oral pathway is open. It has no accepted meaning during a nasal consonant when the oral pathway is closed. The Glottal Enterprises software is the only system that allows you to exclude nasal consonants in an average reading by a mouse click. However some users may want to include the “nasalance” values recorded during speech sounds produced as a nasal consonant in a reading of average nasalance, as, for example, in extremely disordered speech or to compare the numbers obtained with values in the literature obtained using older systems that did not have the capability to eliminate nasal consonants. With the NAS-1 system you have a choice.
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