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The primary function of the ear is to perceive and process human speech. Speech audiometry is a hearing test that uses human speech as stimuli. Its main purpose is to assess the status of a sound stimulus in the ear and guide specialists regarding the patient's auditory function. Thresholds determined for this test include the Speech Recognition Threshold (SRT), Speech Discrimination Score (SDS), Most Comfortable Loudness Level (MCL), and Uncomfortable Loudness Level (UCL).
The SRT is the sound intensity level at which a patient can correctly repeat 50% of the words presented. The patient listens to lists of six three-syllable words, typically with an initial intensity 10-15 dB above the expected threshold. If the patient repeats the words correctly, the intensity is lowered by 5 dB and another list is presented. This continues until the patient correctly repeats only two out of six words; the intensity level from the previous trial is then considered the SRT.
The SDS focuses on the patient's ability to repeat 25 monosyllabic words presented at an intensity 25-40 dB above their SRT. The percentage of correctly repeated words is multiplied by four to obtain the SDS. In patients without hearing complaints, this score is typically around 90%.
The MCL is the listening level that falls between the SRT and the UCL.
The UCL is the sound intensity level at which the patient reports discomfort.
Patients with conductive hearing loss typically exhibit higher SRT and UCL values. In individuals without hearing complaints, speech audiometry typically results in an SRT of 20 dB, an MCL of 40-60 dB, an SDS of 90-100%, and a UCL of 100-120 dB.
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The SRT is the sound intensity level at which a patient can correctly repeat 50% of the words presented. The patient listens to lists of six three-syllable words, typically with an initial intensity 10-15 dB above the expected threshold. If the patient repeats the words correctly, the intensity is lowered by 5 dB and another list is presented. This continues until the patient correctly repeats only two out of six words; the intensity level from the previous trial is then considered the SRT.
The SDS focuses on the patient's ability to repeat 25 monosyllabic words presented at an intensity 25-40 dB above their SRT. The percentage of correctly repeated words is multiplied by four to obtain the SDS. In patients without hearing complaints, this score is typically around 90%.
The MCL is the listening level that falls between the SRT and the UCL.
The UCL is the sound intensity level at which the patient reports discomfort.
Patients with conductive hearing loss typically exhibit higher SRT and UCL values. In individuals without hearing complaints, speech audiometry typically results in an SRT of 20 dB, an MCL of 40-60 dB, an SDS of 90-100%, and a UCL of 100-120 dB.