Ignite Creation Date:
2024-05-05 @ 5:02 PM
Last Modification Date:
2024-10-26 @ 9:27 AM
Study NCT ID:
NCT00371839
Status:
COMPLETED
Last Update Posted:
2014-12-08
First Post:
2006-08-31
Brief Title:
Clinical Applications for Time-Compressed Speech Tests
Sponsor:
US Department of Veterans Affairs
Organization:
VA Office of Research and Development
Study Overview
Official Title:
Clinical Applications for Time-Compressed Speech Tests
Status:
COMPLETED
Status Verified Date:
2014-11
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
The purpose of this study is to determine the effects of age-related cognitive changes on hearing aid benefit based on hearing aid compression time constants
The hypothesis is that people with poor working memory skills will benefit from slow time constants in hearing aid compression while those with good working memory skills will be able to benefit from more sophisticated compression algorithms with rapid time constants
The hypothesis is that people with poor working memory skills will benefit from slow time constants in hearing aid compression while those with good working memory skills will be able to benefit from more sophisticated compression algorithms with rapid time constants
Detailed Description:
Recent research has shown the relevance of cognitive function in hearing aid evaluation and the sensitivity of the aging auditory system to temporal distortions The proposed investigation will examine the interaction of working memory and hearing aid compression method on speech recognition in background competition for older listeners This interaction will be investigated for the following three forms of background competition
1 Competition from continuous speech-shaped noise
2 Competition from speech-modulated noise
3 Competition from a single interfering talker
The goals of the study will be accomplished in two phases In the first phase 160 adults aged 50 through 75 years will be evaluated on a battery of tests to determine their cognitive capacity time-compressed speech scores and their candidacy for inclusion in the second phase of the study At the conclusion of this phase of testing the participants will be divided into three groups
1 subjects with TCS test scores in the highest quartile the HIGH group
2 subjects with TCS test scores in the lowest quartile the LOW group
3 the remaining listeners
The second phase of the experiment will include listeners from the HIGH and LOW groups only These subjects will be evaluated with respect to their speech recognition ability for three types of interference steady-state noise speech-modulated noise single interfering talker The HINT test Nilsson Soli Sumida 1995 Nilsson et al 1994 will be used to obtain the signal-to-noise ratio SNR at 50 recognition for the three masking conditions for each of three types of amplification
1 one- channel linear amplification LINEAR with frequency shaping
2 two-channel wide dynamic range compression with fast time constants FAST
3 two-channel wide dynamic range compression with slow time constants SLOW Listener groups will be compared across hearing aid conditions and across background interference conditions
1 Competition from continuous speech-shaped noise
2 Competition from speech-modulated noise
3 Competition from a single interfering talker
The goals of the study will be accomplished in two phases In the first phase 160 adults aged 50 through 75 years will be evaluated on a battery of tests to determine their cognitive capacity time-compressed speech scores and their candidacy for inclusion in the second phase of the study At the conclusion of this phase of testing the participants will be divided into three groups
1 subjects with TCS test scores in the highest quartile the HIGH group
2 subjects with TCS test scores in the lowest quartile the LOW group
3 the remaining listeners
The second phase of the experiment will include listeners from the HIGH and LOW groups only These subjects will be evaluated with respect to their speech recognition ability for three types of interference steady-state noise speech-modulated noise single interfering talker The HINT test Nilsson Soli Sumida 1995 Nilsson et al 1994 will be used to obtain the signal-to-noise ratio SNR at 50 recognition for the three masking conditions for each of three types of amplification
1 one- channel linear amplification LINEAR with frequency shaping
2 two-channel wide dynamic range compression with fast time constants FAST
3 two-channel wide dynamic range compression with slow time constants SLOW Listener groups will be compared across hearing aid conditions and across background interference conditions
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None