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SPEECH CLASSIFICATION CHART
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Audibility
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Class 1
0—10%
Speech Impairment
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Can produce speech of intensity sufficient for most of the needs of everyday speech communication, although this sometimes may require effort and occasionally may be beyond the patient’s capacity.
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Class 2 11—35%
Speech impairment
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Can produce speech of intensity sufficient for many of the needs of everyday speech communication, and is usually heard under average conditions; however, may have difficulty in automobiles, buses, trains, stations, restaurants, etc.
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Class 3 35—60%
Speech Impairment
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Can produce speech of intensity sufficient for some of the needs of everyday speech communication, such as close conversation; however, has considerable difficulty in such noisy places as listed above; the voice tires rapidly and tends to become inaudible after a few seconds.
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Class 4
61—85%
Speech Impairment
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Can produce speech of intensity sufficient for a few of the needs of everyday speech communication; can barely be heard by a close listener or over the telephone, perhaps may be able to whisper; audibly, but has no voice.
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Class 5 86—100%
Speech Impairment
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Can produce speech of intensity sufficient for none of the needs of everyday speech communication.
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Intelligibility
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Class 1 0—10%
Speech impairment
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Can perform most of the articulatory acts necessary for everyday speech communication, although listeners occasionally ask the patient to repeat and the patient may find it difficult or even impossible to produce a few phonetic units.
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Class 2 11—35%
Speech Impairment
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Can perform many of the necessary articulatory acts for everyday speech communication. Can speak name, address, etc., and be understood by a stranger, but may have numerous inaccuracies; sometimes appears to have difficulty articulating.
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Class 3 36-60%
Speech impairment
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Can perform some of the necessary articulatory acts for everyday speech communication; can usually converse with family and friends, however, strangers may find it difficult to understand the patient; may often be asked to repeat.
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Class 4
61—85%
Speech impairment
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Can perform a few of the necessary articulatory acts for everyday speech communication; can produce some phonetic units; may have approximations for a few words such as names of own family; however, unintelligible out of context.
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