Allophonic variations in the quality and voicelessness of British English Received Pronunciation /1/ were investigated, largely through their acoustic correlates as revealed by spectrography. (Author/RM)

Several traditional phonetic theories are explained and discussed. It is asserted that recent advances in knowledge of speech production and speech perception show that these theories are descriptively inadequate and that physiologic principles may instead structure phonetic feature theories. (Author/RM)

In order to investigate the articulatory dynamics of the tongue in the production of Swedish vowels, electromyographic (EMG) and X-ray microbeam studies were performed on a native Swedish subject. The EMG signals were used to obtain average indication of the muscle activity of the tongue as a function of time. (NCR)

A nasal separator was used to measure the oral and nasal components in the speech of a normal adult Australian population. Results indicated no difference in oral and nasal sound pressure levels for read versus spontaneous speech samples; however, females tended to have a higher nasal component than did males. (Author/TL)

The relationship between the rhythms of spoken language and the rhythms of other human behavior is examined in terms of: (1) types of rhythmic structures observed, (2) rate of succession of rhythmic units, (3) a perceptual tendency equalization of physically unequal intervals, and (4) the variability of rhythmic motor action. (Author/RM)

The magnitudes and patterns of two-point difference limens (DL) of the tongue were studied in children with and without articulation errors. Many children with misarticulation of /r/ had DLs that differed in magnitude and pattern from those of children with normal articulation and those with misarticulations of /s/. (NCR)