How is speech intelligibility measured?
Basics. Speech intelligibility is measured by reproducing a known signal (the STIPA test signal) and measuring the quality of that signal as it reaches each of the measurement positions.
What is the speech intelligibility test?
The Speech Intelligibility Test (SIT) brings both sentence and word features of the Assessment of Intelligibility of Dysarthric Speech (Yorkston & Beukelman, 1981), the Computerized Assessment of Intelligibility of Dysarthric Speech, CAIDS, (Yorkston, Beukelman, and Traynor, 1984), and the Phoneme Intelligibility Test …
How is STI Pa measured?
Using STIPA to Test Speech Intelligibility Speech intelligibility can be measured by playing a known test signal, such as the STIPA signal, through the PA of the area you wish to test. To ensure the most accurate results, it is recommended that you use a calibrated signal source, such as the BTB65 Talkbox.
What is intelligibility in audio?
The term Speech Intelligibility describes how much of the clearness and distinctiveness of spoken information is preserved when transmitted over a PA system.
How can I test my intelligibility?
There are two primary approaches to measuring intelligibility: 1) word-identification approaches that involve having an unfamiliar listener orthographically transcribe what they think the child said, and 2) scaled ratings that involve making global judgments about a child’s intelligibility.
How do you read a speech intelligibility index?
Basically, an SII of 0 implies that none of the speech information, in a given setting, is available (audible and/or usable) to improve speech understanding. An SII of 1.0 implies that all the speech information in a given setting is both audible and usable for a listener.
What is the pediatric speech intelligibility test?
Description. The Pediatric Speech Intelligibility (PSI) test is a closed-set test composed of 20 monosyllabic words and a 10-sentence procedure. The monosyllabic word lists consist of simple nouns like “bear” and “fork.” The sentences consist of two formats.
How intelligible Should a 6 year old be?
A recent small-scale cross-sectional study by Hodge and Gotzke (2014a) examining transcription intelligibility of 12 typically developing children at the ages of 3, 4, 5, and 6 years by naïve listeners suggests that intelligibility on the TOCS for single words increased linearly from 70% at age 3 years to 87% at age 6 …
How do you calculate STI?
Technically, the STI is calculated as the weighted sum of modulation transfer indices MTI, one for each octave frequency band from 125 Hz through 8 kHz (where each MTI value is derived from MTF values over 14 different modulation frequencies, see Table 2) taking into account auditory effects according to IEC 60268-16.
What is intelligibility and clarity?
Intelligibility is a measure of how comprehendible speech is, or the degree to which speech can be understood. Intelligibility is affected by spoken clarity, explicitness, lucidity, comprehensibility, perspicuity, and precision.
What are the intelligibility factors?
Intelligibility is affected by the level (loud but not too loud) and quality of the speech signal, the type and level of background noise, reverberation (some reflections but not too many), and, for speech over communication devices, the properties of the communication system.
How do you assess speech intelligibility in adults?
Several informal, and often subjective, clinical methods may be used to assess intelligibility. These methods involve perceptual ratings using spontaneous speech, reading passages, and nonstandardized lists of words or phrases.