This section on extended IPA symbols was prepared by the Executive Committee of the International Clinical Phonetics and Linguistics Association (ICPLA), which can be contacted through the Secretary of the ICPLA, Wolfram Ziegler, Städt. Krankenhaus München-Bogenhausen, EKN, Dachauer Str. 164, D-80992 München, Germany. The original text and chart first appeared as an article in the Journal of the International Phonetic Association 24, 95–8 (1994), entitled ‘The ExtlPA Chart’, by the ICPLA Executive Committee. The list of IPA Numbers for ExtlPA symbols which has been added here appeared originally in an article by Martin J. Ball entitled ‘Computer coding of the IPA: Extensions to the IPA’ in the Journal of the International Phonetic Association 21,36–41(1991).

1 Introduction

At the 1989 Kiel Convention of the IPA, a sub-group was established to draw up recommendations for the transcription of disordered speech. The report produced at the Convention appeared in print in Duckworth, Allen, Hardcastle, and Ball (1990), being mainly a list of symbols, termed ‘Extensions to the IPA’, or ‘ExtlPA’ for short. Examples of the use of the ExtlPA symbols are given in Ball (1991), Howard (1993) and Ball, Code, Rahilly and Hazlett (1994) among others, and Ball (1993) includes them at textbook level. Various changes and additions to the original set of symbols are reported in Bernhardt and Ball (1993). The changes meant, however, that there was a need for a listing of the current set of symbols, preferably in as concise a form as possible. There was also felt to be a need for the symbol set to receive overt recognition from a relevant society, therefore the 1994 publication in JIPA marked the official adoption of the ExtlPA symbols by the International Clinical Phonetics and Linguistics Association (ICPLA).

2 The Chart

The chart included here is clearly based on the current format of the IPA Chart to make it directly comparable and equally user-friendly. There are, however, a few comments that will aid in the use of the chart. First, shaded squares on the main chart represent – as in the IPA Chart – articulations that are deemed impossible to make. Blank squares stand for sounds for which the IPA already provides symbols, or for sounds that are possible to make but for which no symbols are available. Clearly, this difference is straightforward to resolve with access to both charts.