Hearing discrimination is measured phonetically by scoring correct speech sounds.
Evidence
Speech audiometry involves the use of an audiometer and speech material that is usually recorded on audio compact disc (CD). Individual single-syllable words such as bus, fun, shop are played to the subject, who is asked to repeat them, providing part words if that is all they have heard. Each spoken response is scored phonetically in terms of the number of correct sounds in the response (for example, if bun or boss was the response for bus, the subject would score two out of three). Words are presented in sets of 10, and if a total phonetic score of 10% or better is achieved for a list, the level is reduced by 10 dB and a new set of 10 words is played, repeating the process until the score falls below 10%. The speech reception threshold (SRT) is the lowest level at which a 10% phonetic score can be achieved. The speech discrimination score (SDS) is the percentage of single-syllable words that can be identified at a comfortable loudness level. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2371
Categorization
Category: Definitional Content
- DEFINE: Defines SRT and SDS precisely, including the phonetic scoring method and the 10%-threshold adaptive staircase procedure.
Related
- Speech perception requires both detection and discrimination of sound components (similarity 0.84)
- Detecting sounds and discriminating between them are distinct hearing abilities. (similarity 0.82)
- Speech discrimination requires five distinct auditory features (similarity 0.81)
- Speech reception thresholds closely duplicate averaged audiometric thresholds (similarity 0.81)
- Speech reception thresholds are measured adaptively with listener self-scoring. (similarity 0.81)
- Auditory detection and discrimination are distinct abilities that can diverge (similarity 0.80)
- Hearing thresholds vary individually but share a common perceptual order (similarity 0.80)
- Hearing thresholds are clinically tested at octave-spaced frequencies covering the speech range (similarity 0.80)
- Detection is prerequisite to but insufficient for sound discrimination (similarity 0.79)
- Thresholds are statistical detection probabilities, not absolute cutoffs (similarity 0.79)
- No single standard metric describes auditory intensity discrimination (similarity 0.79)
- Thresholds are measured by presenting many stimulus levels and fitting a psychometric function (similarity 0.79)
- Objective hearing measures require linking perception, physiology, and speech ability. (similarity 0.79)
- Thresholds and auditory scales link physical sound attributes to perceived auditory events (similarity 0.78)
Broader Connections
- Hearing thresholds are clinically tested at octave-spaced frequencies covering the speech range
#corroborates(0.75) — David Howard, Jamie Angus, coustics and Psychoacoustics, 2325