Background:Diurnal changes can be defined as the time of the day over an individual's performance level for different activities that involve physical and mental tasks.Objective:The current study aimed to evaluate...Background:Diurnal changes can be defined as the time of the day over an individual's performance level for different activities that involve physical and mental tasks.Objective:The current study aimed to evaluate the effect of diurnal changes in scores obtained for the Dichotic Consonant-Vowel paradigm by young adults with normal hearing sensitivity.Method:Based on the‘Morningness-Eveningness questionnaire’given by Horne&Ostberg,the subjects were divided into moderately-morning,intermediate and moderately-evening categories.The Dichotic Consonant-Vowel tests were performed during morning and evening,and the right ear,left ear and double correct scores were compared between morning and evening for each category.Results:There was significant diurnal changes noted for moderately morning and evening categories,where morning-type individuals performed better during morning and evening-type individuals performed better during the evening.The scores of intermediate individuals remained unchanged between morning and evening test results.Conclusion:Diurnal change is a phenomenon associated with an individual's biological clock mechanism.Hence,attention and inhibitory controls aid them in carrying out tasks that require sufficient physical and mental efforts.The current study suggests that clinicians and researchers consider diurnal changes as an extraneous variable that could affect the reliability of the Dichotic Consonant-Vowel test results.展开更多
Background:Classic dichotic listening tests using speech stimuli result in right ear advantage,due to the dominant crossed pathway for speech and language.It is presumed that similar crossed dominance could exist for ...Background:Classic dichotic listening tests using speech stimuli result in right ear advantage,due to the dominant crossed pathway for speech and language.It is presumed that similar crossed dominance could exist for non-speech stimuli too.Hence,this is an attempt to develop and validate the dichotic nonspeech test using environmental stimuli and explore the effect of focused attention on this test.Materials and method:Three lists of dichotic stimuli were created using these sounds with fifteen tokens in each list.Four professionals and non-professionals validated these materials.Normative estimation was obtained by administering the newly developed test on 70 adults and 70 children using a free-recall and forced-recall condition.Result:The results showed a significant difference between the left ear and right scores where the left ear score was better than the right,depicting left ear advantage(LEA)for free recall condition in both groups.In the forced recall condition,LEA was not seen;rather the mean score was significantly higher in the attended ear,irrespective of the stimuli presented to the right or left ear.The test-retest reliability in free recall was good in both the ears and moderate for forced right ear conditions.Conclusion:The novel test consistently showed LEA with good reliability and can be used to assess the hemispheric asymmetry in normal subjects and also in test batteries for the clinical population.展开更多
Speech intelligibility (SI) is an important index for the design and assessment of speech purpose hall. The relationship between Chinese speech intelligibility scores in rooms and speech transmission index (STI) under...Speech intelligibility (SI) is an important index for the design and assessment of speech purpose hall. The relationship between Chinese speech intelligibility scores in rooms and speech transmission index (STI) under diotic listening condition was studied using monaural room impulse responses obtained from the room acoustical simulation software Odeon in previous paper. The present study employs the simulated binaural room impulse responses and auralization technique to obtain the subjective Chi- nese speech intelligibility scores using rhyme test. The relationship between Chinese speech intelligi- bility scores and STI is built and validated in rooms using dichotic (binaural) listening. The result shows that there is a high correlation between Chinese speech intelligibility scores and STI using di- chotic listening. The relationship between Chinese speech intelligibility scores and STI under diotic and dichotic listening conditions is also analyzed. Compared with diotic listening, dichotic (binaural) listening (an actual listening situation) can improve 2.7 dB signal-to-noise ratio for Mandarin Chinese speech intelligibility. STI method can predict and evaluate the speech intelligibility for Mandarin Chi- nese in rooms for dichotic (binaural) listening.展开更多
To explore Chinese Mandarin speech identification in babble of spatially separated talkers,subjective speech identification tests of word and sentence were made with diotic and dichotic listening respectively.The resu...To explore Chinese Mandarin speech identification in babble of spatially separated talkers,subjective speech identification tests of word and sentence were made with diotic and dichotic listening respectively.The result shows that the speech identification scores changed non-monotonically with the masker number N increasing from 1 to infinity,first declining gradually until reaching their minimums and then rising.Statistical difference was found between the scores of diotic and dichotic listening.For all the values of N checked,dichotic listening achieved higher scores than diotic listening,showing that dichotic effect has an advantage for reducing babble masking.And the scores of sentence test are significantly higher than that of word test with whether diotic or dichotic listening,indicating that the linguistic connection in sentence can help listeners get a better perception of the target speech in babble masking.展开更多
文摘Background:Diurnal changes can be defined as the time of the day over an individual's performance level for different activities that involve physical and mental tasks.Objective:The current study aimed to evaluate the effect of diurnal changes in scores obtained for the Dichotic Consonant-Vowel paradigm by young adults with normal hearing sensitivity.Method:Based on the‘Morningness-Eveningness questionnaire’given by Horne&Ostberg,the subjects were divided into moderately-morning,intermediate and moderately-evening categories.The Dichotic Consonant-Vowel tests were performed during morning and evening,and the right ear,left ear and double correct scores were compared between morning and evening for each category.Results:There was significant diurnal changes noted for moderately morning and evening categories,where morning-type individuals performed better during morning and evening-type individuals performed better during the evening.The scores of intermediate individuals remained unchanged between morning and evening test results.Conclusion:Diurnal change is a phenomenon associated with an individual's biological clock mechanism.Hence,attention and inhibitory controls aid them in carrying out tasks that require sufficient physical and mental efforts.The current study suggests that clinicians and researchers consider diurnal changes as an extraneous variable that could affect the reliability of the Dichotic Consonant-Vowel test results.
基金supported by the cognitive science research initiative of the Department of science and technologyGovernment of India Grant ID:DST/CSRI/2017/442.
文摘Background:Classic dichotic listening tests using speech stimuli result in right ear advantage,due to the dominant crossed pathway for speech and language.It is presumed that similar crossed dominance could exist for non-speech stimuli too.Hence,this is an attempt to develop and validate the dichotic nonspeech test using environmental stimuli and explore the effect of focused attention on this test.Materials and method:Three lists of dichotic stimuli were created using these sounds with fifteen tokens in each list.Four professionals and non-professionals validated these materials.Normative estimation was obtained by administering the newly developed test on 70 adults and 70 children using a free-recall and forced-recall condition.Result:The results showed a significant difference between the left ear and right scores where the left ear score was better than the right,depicting left ear advantage(LEA)for free recall condition in both groups.In the forced recall condition,LEA was not seen;rather the mean score was significantly higher in the attended ear,irrespective of the stimuli presented to the right or left ear.The test-retest reliability in free recall was good in both the ears and moderate for forced right ear conditions.Conclusion:The novel test consistently showed LEA with good reliability and can be used to assess the hemispheric asymmetry in normal subjects and also in test batteries for the clinical population.
基金the National Natural Science Foundation of China (Grant No. 10774048)
文摘Speech intelligibility (SI) is an important index for the design and assessment of speech purpose hall. The relationship between Chinese speech intelligibility scores in rooms and speech transmission index (STI) under diotic listening condition was studied using monaural room impulse responses obtained from the room acoustical simulation software Odeon in previous paper. The present study employs the simulated binaural room impulse responses and auralization technique to obtain the subjective Chi- nese speech intelligibility scores using rhyme test. The relationship between Chinese speech intelligi- bility scores and STI is built and validated in rooms using dichotic (binaural) listening. The result shows that there is a high correlation between Chinese speech intelligibility scores and STI using di- chotic listening. The relationship between Chinese speech intelligibility scores and STI under diotic and dichotic listening conditions is also analyzed. Compared with diotic listening, dichotic (binaural) listening (an actual listening situation) can improve 2.7 dB signal-to-noise ratio for Mandarin Chinese speech intelligibility. STI method can predict and evaluate the speech intelligibility for Mandarin Chi- nese in rooms for dichotic (binaural) listening.
基金supported by the National Natural Science Foundation of China(10774048,51078326)Science Foundation of Zhejiang Province,China(Y5090138)Science and Technology Planning Project of Guangdong Province,China(2011B061300066)
文摘To explore Chinese Mandarin speech identification in babble of spatially separated talkers,subjective speech identification tests of word and sentence were made with diotic and dichotic listening respectively.The result shows that the speech identification scores changed non-monotonically with the masker number N increasing from 1 to infinity,first declining gradually until reaching their minimums and then rising.Statistical difference was found between the scores of diotic and dichotic listening.For all the values of N checked,dichotic listening achieved higher scores than diotic listening,showing that dichotic effect has an advantage for reducing babble masking.And the scores of sentence test are significantly higher than that of word test with whether diotic or dichotic listening,indicating that the linguistic connection in sentence can help listeners get a better perception of the target speech in babble masking.
