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docs/phonemes.md: expand out the places of articulation to cover more cases.

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Reece H. Dunn 8 years ago
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one or more passive articulators<sup>\[<a href="#ref9">9</a>\]</sup>. The one or more passive articulators<sup>\[<a href="#ref9">9</a>\]</sup>. The
possible places of articulation are: possible places of articulation are:


| Place of Articulation | Feature | Symbol | Active | Lips | Passive |
|-----------------------|-----------|--------|--------|-------|---------|
| bilabial | `blb` | | `lbl` | `ulp` | |
| labiodental | `lbd` | ◌̪ | `lbl` | | `utt` |
| bilabial-labiodental | `bld` | | `bld` | `ulp` | `utt` |
| dental | `dnt` | ◌̪ | `apc` | | `utt` |
| alveolar | `alv` | | `apc` | | `alf` |
| palato-alveolar | `pla` | | `lmn` | | `alb` |
| retroflex | `rfx` | | `sac` | | `hpl` |
| alveolo-palatal | `alp` | | `dsl` | | `alb` |
| palatal | `pal` | | `dsl` | | `hpl` |
| velar | `vel` | | `dsl` | | `spl` |
| labio-velar | `lbv` | | `dsl` | `ulp` | `spl` |
| uvular | `uvl` | | `dsl` | | `uvu` |
| pharyngeal | `phr` | | `rdl` | | `prx` |
| glottal | `glt` | | `lyx` | | `gts` |
| Place of Articulation | Feature | Symbol | Active | Lips | Teeth | Other |
|-----------------------|-----------|--------|--------|-------|---------|---------|
| bilabial | `blb` | | `lbl` | `ulp` | | |
| linguolabial | `lgl` | ◌̼ | `lmn` | `ulp` | | |
| labiodental | `lbd` | ◌̪ | `lbl` | | `utt` | |
| bilabial-labiodental | `bld` | | `bld` | `ulp` | `utt` | |
| interdental | `idt` | ◌̪͆ | `lmn` | | `utt` | |
| dental | `dnt` | ◌̪ | `apc` | | `utt` | |
| denti-alveolar | `dta` | | `lmn` | | `utt` | `alf` |
| alveolar | `alv` | | `lmn` | | | `alf` |
| apico-alveolar | `apa` | ◌̺ | `apc` | | | `alf` |
| palato-alveolar | `pla` | | `lmn` | | | `alb` |
| apical retroflex | `arf` | | `sac` | | | `alb` |
| retroflex | `rfx` | ◌̺ | `apc` | | | `hpl` |
| alveolo-palatal | `alp` | | `dsl` | | | `alb` |
| palatal | `pal` | | `dsl` | | | `hpl` |
| velar | `vel` | | `dsl` | | | `spl` |
| labio-velar | `lbv` | | `dsl` | `ulp` | | `spl` |
| uvular | `uvl` | | `dsl` | | | `uvu` |
| pharyngeal | `phr` | | `rdl` | | | `prx` |
| epiglotto-pharyngeal | `epp` | | `lyx` | | | `prx` |
| (ary-)epiglottal | `epg` | | `lyx` | | | `egs` |
| glottal | `glt` | | `lyx` | | | `gts` |


The features for these places of articulation are provided for convenience, and The features for these places of articulation are provided for convenience, and
to make it easier to describe the IPA consonants. Internally, the active and to make it easier to describe the IPA consonants. Internally, the active and
The `bld` place of articulation is used for `afr` consonants that have a `blb` The `bld` place of articulation is used for `afr` consonants that have a `blb`
onset and a `lbd` release, e.g. in the p͡f consonant. onset and a `lbd` release, e.g. in the p͡f consonant.


The `alv` consonant is `lmn` as found in French and Spanish, while `apa` is
`apc` as found in English, as such ◌̻ (*laminal*) is not needed.

__NOTE:__ The IPA charts make a distinction between pharyngeal and epiglottal __NOTE:__ The IPA charts make a distinction between pharyngeal and epiglottal
consonants, but Wikipedia does not. This model uses the Wikipedia descriptions. consonants, but Wikipedia does not. This model uses the Wikipedia descriptions.




#### Articulation #### Articulation


| Feature | Kirshenbaum | IPA | Name |
|---------|-------------|-----|-----------------|
| `apc` | | ◌̺ | apical |
| `lmn` | | ◌̻ | laminal |
| `lgl` | | ◌̼ | linguolabial |

The following IPA diacritics are only used by eSpeak NG to fill out positions The following IPA diacritics are only used by eSpeak NG to fill out positions
in the IPA consonant and vowel charts. As such those phonemes are transcribed in the IPA consonant and vowel charts. As such those phonemes are transcribed
according to the features at that position, not using the features at the according to the features at that position, not using the features at the

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