자극음 종류에 따른 쾌적역치, 불쾌역치, 역동범위
Most Comfortable Level, Uncomfortable Level, and Dynamic Range with Stimulus Type
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초록
This study was to establish the estimates of MCL (Most Comfortable Level), UCL (UnComfortable Level), and DR(Dynamic Range) using different stimuli. There are several types of stimulus; 1) pure tone of 0.5, 1, 2, 3, and 4kHz, 2) narrow band noise of 0.5, 1, 2, 3, and 4 kHz, 3) monosyllabic words, 4) bisyllabic words, 5) sentence, and6) speech noise. 40 ears (10 males and 10 females) with normal hearing and without sound tolerance problems werecalculated and the average of the participants’ age was 20.30±1.66 years old. Stimulus was presented by TDH- 39headphone and 5 dB steps of ascending method above threshold using pure tone average or speech recognitionthreshold continuing to the uncomfortable loud level. The nine categories of scaling were used from very soft topainfully loud. The results were as follows: 1) MCL and UCL were showed differences significantly(p < .05) withstimulus type, 2) MCL and UCL of using NBN stimuli were higher than pure tone, speech stimulus (monosyllabicwords, bisyllabic words, sentence) were the highest UCL, 3) MCL and UCL were recommended recordings by bothears. These results can be useful for considering different stimuli according to subject’s sound sensitivity anddifferent situations.
Abstract
This study was to establish the estimates of MCL (Most Comfortable Level), UCL (UnComfortable Level), and DR(Dynamic Range) using different stimuli. There are several types of stimulus; 1) pure tone of 0.5, 1, 2, 3, and 4kHz, 2) narrow band noise of 0.5, 1, 2, 3, and 4 kHz, 3) monosyllabic words, 4) bisyllabic words, 5) sentence, and6) speech noise. 40 ears (10 males and 10 females) with normal hearing and without sound tolerance problems werecalculated and the average of the participants’ age was 20.30±1.66 years old. Stimulus was presented by TDH- 39headphone and 5 dB steps of ascending method above threshold using pure tone average or speech recognitionthreshold continuing to the uncomfortable loud level. The nine categories of scaling were used from very soft topainfully loud. The results were as follows: 1) MCL and UCL were showed differences significantly(p < .05) withstimulus type, 2) MCL and UCL of using NBN stimuli were higher than pure tone, speech stimulus (monosyllabicwords, bisyllabic words, sentence) were the highest UCL, 3) MCL and UCL were recommended recordings by bothears. These results can be useful for considering different stimuli according to subject’s sound sensitivity anddifferent situations.
참고문헌 (16)
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