What's the difference between digraph and diphthong?

Digraph


Definition:

  • (n.) Two signs or characters combined to express a single articulated sound; as ea in head, or th in bath.

Example Sentences:

  • (1) The results from both these test systems are displayed in directed graph form and these digraphs (directed graph) show marked asymmetry in both young and old.
  • (2) Since nervous systems are representable by graphs or better with special digraphs, the networks, it follows that the brains are asymmetric in a strong sense according to which all cells are distinguishable from each other alone by their internal connections.

Diphthong


Definition:

  • (n.) A coalition or union of two vowel sounds pronounced in one syllable; as, ou in out, oi in noise; -- called a proper diphthong.
  • (n.) A vowel digraph; a union of two vowels in the same syllable, only one of them being sounded; as, ai in rain, eo in people; -- called an improper diphthong.
  • (v. t.) To form or pronounce as a diphthong; diphthongize.

Example Sentences:

  • (1) The clustering in the present song, however, may also be due to a tendency for a mid vowel to be realized as a higher-beginning diphthong, which is characteristic of the North-Estonian coastal dialect area where the singers come from.
  • (2) Those confusions occurring in visual diphthong recognition tended to shift toward the stressed vowel element of the diphthong or to a vowel produced in a manner similar to the stressed element.
  • (3) This paper describes a successful experiment of creating several different diphthongs by judicious choice of the phase angles of a flat-spectrum waveform.
  • (4) Pronunciation of the diphthong La... La... La... causes upward and forward projection of the prosthesis.
  • (5) The effects of reverberation on the perception of vowels and diphthongs were evaluated using 10 subjects with moderate sensorineural hearing losses.
  • (6) The effects of noise and reverberation on the identification of monophthongs and diphthongs were evaluated for ten subjects with moderate sensorineural hearing losses.
  • (7) Electromyography records contraction of the mylo-hyoid during pronunciation of these diphthongs.
  • (8) In addition, a feature related to overall area of maximum lip opening and two features unique to diphthong perception were tentatively identified.
  • (9) This study investigated vowel and diphthong lipreading performance from 0 degree and 90 degree angles of observation.
  • (10) It appears that modifications in relative timing may be due to adjustments in the jaw cycle as a result of the compound nature of jaw movement for diphthongs as compared to vowels, with further modifications due to the effect of stress on these compound movements.
  • (11) Four vowels, [i], [a], [e], [u], and one diphthong [ou], produced by two male and two female tracheoesophageal speakers were analyzed by the LPC autocorrelation method.
  • (12) Six- to seven-month-old infants were tested on their ability to discriminate among three speech sounds which differed on the basis of formant-transition duration, a major cue to distinctions among stop, semivowel and diphthong classes.
  • (13) Additionally, issues related to talker normalization, coarticulation effects, segmentation, pitch, transposition, and diphthongization are discussed.
  • (14) For the diphthongs in both noise and reverberation, there was a tendency to judge a diphthong as the beginning monophthong.
  • (15) These models deal primarily with the problem of "target undershoot" associated with the coarticulation of vowels with consonants in natural speech and with the issue of "vowel-inherent spectral change" or diphthongization of English vowels.
  • (16) Although vowel confusions occurred in both test conditions, the number of vowels and diphthongs affected and the total number of errors made were significantly greater under the reverberant condition.
  • (17) Finally, the role of vowel-inherent dynamic properties, including duration and diphthongization, is briefly reviewed.
  • (18) The diphthong stimuli were significantly easier to identify than the vowel stimuli at both angles of observation.