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Which journal published the article related to speech recognition decreases in 1964?
Who is the author of the book 'Audiometry' published in 2011?
What is the name of the test developed for speech discrimination utilizing CNC monosyllabic words?
Who is the Professor in ENT at the University of Umeå?
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What is the title of the article published in 1952 related to speech audiology?
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Who is the author of the article 'Back to Basics: Speech Audiometry' published in 2012?
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What is the title of the online resource for otolaryngologists?
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Who is the Professor and Chairman of the Division of Otolaryngology at the University of Cape Town?
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What is the title of the book published in 2008 related to audiology?
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Where is Dewet Swanepoel located?
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Study Notes
Speech Recognition Threshold (SRT)
- The SRT is the most frequently used speech threshold test, measuring the intensity level at which a listener can correctly repeat 50% of words presented.
- The SRT corresponds roughly to the average of the pure tone audiometry thresholds at 500, 1000, and 2000 Hz.
- When the pure tone audiogram is steeply sloping (high frequency hearing loss), the SRT corresponds better with either the best pure tone air conduction threshold or the best pure tone bone conduction threshold.
Measuring a Masked SRT
- The masked SRT is measured after the unmasked SRT has been determined.
- The patient is instructed to ignore the noise in one ear and repeat the words heard in the other ear to the best of their ability.
- The masking noise is introduced to the non-test ear at 10dB above the SRT of the non-test ear.
- The masking level is increased by 5dB and six more words are presented, repeating this process until the masking level is 15dB higher than the initial level.
Insert Earphones
- The interaural attenuation for insert earphones is about 60dB.
- Therefore, masking is required when the SRT of the test ear minus the best pure tone bone conduction threshold in the non-test ear is >60dB.
Speech Discrimination Score
- The speech discrimination score (also called word recognition score) is a test of supra-threshold speech perception.
- It indicates the patient's ability to hear and understand speech at typical conversational levels.
- It also indicates how well a patient can perceive speech if the presentation level is increased.
- The score helps the clinician to predict the potential benefits from amplification.
- Phoneically balanced word lists are particularly popular as they ensure that listeners with a steeply sloping audiogram will not find some of the lists easier than others.
Reporting of Word Recognition Results
- The results of word recognition tests can be reported in an audiology report, including the percentage of correct speech recognition at a specific presentation level.
- Examples of reported results include:
- No lesion (normal hearing): 100% speech recognition at presentation level 30dB above PTA.
- Conductive hearing loss: 100% correct speech recognition, but only at increased presentation level.
- Cochlear lesion: unable to reach 100% speech recognition, regardless of increase in presentation level.
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Description
This quiz covers the basics of speech audiometry, including intensity control and speech reception tests used in clinical practice.
