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1.
Figure 2

Figure 2. From: Locus equations are an acoustic expression of articulator synergy.

Analysis of Intercepts into their constituents: slope and average of F2 or TBx at C and V according to Eq. 2 for EMMA data. Frontness increases vertically.

Khalil Iskarous, et al. J Acoust Soc Am. 2010 October;128(4):2021-2032.
2.
Figure 7

Figure 7. From: Locus equations are an acoustic expression of articulator synergy.

EMMA velar data split by front and back vowels. Upper panel: Average TBx position at the beginning of F2 onset (c). Lower panel: TBx-based slopes.

Khalil Iskarous, et al. J Acoust Soc Am. 2010 October;128(4):2021-2032.
3.
Figure 5

Figure 5. From: Locus equations are an acoustic expression of articulator synergy.

Comparison of statistics of CV: TBx relation at the initial point of the formant transition and at the point of tightest closure in the consonant for EMMA data. Frontness increases vertically.

Khalil Iskarous, et al. J Acoust Soc Am. 2010 October;128(4):2021-2032.
4.
Figure 6

Figure 6. From: Locus equations are an acoustic expression of articulator synergy.

Spatial effects in coarticulation: Means and standard deviations of change in TBx between initiation of C formant transition and middle of V for each consonant in EMMA data, separated into back vowels (black) and front vowels (white).

Khalil Iskarous, et al. J Acoust Soc Am. 2010 October;128(4):2021-2032.
5.
Figure 3

Figure 3. From: Locus equations are an acoustic expression of articulator synergy.

Analysis of Intercepts into their constituents: slope and average of F2 or TBx at C and V according to Eq. 2 for XRMB data. b∕p refers to the labial stop, d∕t refers to the alveolar stop, and g∕k refers to the velar stop. Frontness increases vertically.

Khalil Iskarous, et al. J Acoust Soc Am. 2010 October;128(4):2021-2032.
6.
Figure 4

Figure 4. From: Locus equations are an acoustic expression of articulator synergy.

Trajectories of TBx for consonants from EMMA data: For all consonants, the first articulatory sample in the time series corresponds to the acoustic frame in which the formant transition for the consonant begins. Trajectories in black are for the back vowel context, and trajectories in gray are for front vowel context. Frontness increases vertically.

Khalil Iskarous, et al. J Acoust Soc Am. 2010 October;128(4):2021-2032.
7.
Figure 1

Figure 1. From: Locus equations are an acoustic expression of articulator synergy.

Linear functions relating the horizontal position of the tongue back (TBx) at the consonant release (dependent variable) to TBx at the middle of the vowel (right) and F2 at the consonant release to F2 at the middle of the vowel (left) for each of the consonants examines. Each line fits 90 tokens from six vowels for the EMMA subject.

Khalil Iskarous, et al. J Acoust Soc Am. 2010 October;128(4):2021-2032.

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