|
|
Home
Search
Study Topics
Glossary
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||||||||||||||||||||||||||||
| Sponsored by: |
National Institute on Deafness and Other Communication Disorders (NIDCD) |
|---|---|
| Information provided by: | National Institute on Deafness and Other Communication Disorders (NIDCD) |
| ClinicalTrials.gov Identifier: | NCT00738244 |
Purpose
Wind-noise is highly disturbing to hearing impaired individuals wearing hearing aids who wish to participate in outdoor conversations where wind is present or during activities such as walking or running. In these situations, wind noise significantly reduces signal-to-noise ratio and, consequently, the intelligibility of speech and sounds may be significantly impaired. This negative effect is exacerbated with the use of directional microphone schemes in the hearing iads. The objective of this project is to determine the efficacy of the MH Acoustics' multi-microphone wind-noise reduction invention for the digital hearing aids market. MH Acoustics' wind noise reduction technology is unique since it provides instantaneous convergence while maintaining directionality of the microphone array. Current commercial technologies do not provide this feature. We are hypothesizing that, due to the design of the algorithm, speech perception ability and sound quality perception will be better than that available with traditional directional and/or omnidirectional microphone schemes in windy environments.
| Condition |
|---|
|
Hearing Impairment |
| Study Type: | Observational |
| Study Design: | Case-Crossover, Prospective |
| Official Title: | Methods of Wind Noise Suppression in Hearing Aids |
| Estimated Enrollment: | 60 |
| Study Start Date: | November 2007 |
| Estimated Study Completion Date: | November 2009 |
| Estimated Primary Completion Date: | November 2009 (Final data collection date for primary outcome measure) |
| Groups/Cohorts |
|---|
|
1
Normal hearing listeners
|
|
2
Listeners with mild-to-moderate sensorineural hearing loss
|
Two groups of subjects will be recruited to participate: Normal hearing adults and adults with mild to moderately severe hearing loss, ages 18-65. Pure tone audiometrics (re ANSI, 1996) will be done to ascertain the hearing sensitivity through 6ooo Hz. Normal hearing will be defined as thresholds at or better than 20 dB HL (re ANSI, 1996). The only exclusion criterion for the group exhibiting hearing loss is that no thresholds up to and including 3000 Hz will exceed 75 dB, so as to minimize the inclusion of subjects with "dead regions" in the cochlea.
Subjects will be seen for four visits to the laboratory. The first visit will involve documentation of informed consent, and measurement of hearing thresholds. The second, third and fourth visits will consist of testing with the following measures (in random order for each subject) to determine if the various implementations of the wind noise reduction algorithm 1) impact speech perception ability, and/or 2) impact sound quality perception. Each session will take approximately 1.5 hours, with a maximum of six hours over all the sessions. The two speech perception tests that will be utilized include : 1) Connected Speech Test and Hearing in Noise Test, 2) The Hearing in Noise Test (HINT) (Nilsson, Soli, & Sullivan, 1994; Koch, Nilsson
Overall Impression will be influenced by the audibility and masking effect of the noise bursts, whereas Annoyance ratings are significantly correlated to the high frequency emphasis of the stimulus, a potential impact of the extreme suppression conditions (e.g., -18 dB) (Warner & Bentler, 2002; Miedema
Eligibility| Ages Eligible for Study: | 18 Years to 75 Years |
| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | Yes |
| Sampling Method: | Non-Probability Sample |
Two groups (30 each) of subjects will be recruited to participate: Normal hearing adults and adults with mild to moderately severe hearing loss, ages 18-65. Pure tone audiometrics (re ANSI, 1996) will be done to ascertain the hearing sensitivity through 6ooo Hz. Normal hearing will be defined as thresholds at or better than 20 dB HL (re ANSI, 1996). The only exclusion criterion for the group exhibiting hearing loss is that no thresholds up to and including 3000 Hz will exceed 75 dB, so as to minimize the inclusion of subjects with "dead regions" in the cochlea.
Inclusion Criteria:
Exclusion Criteria:
Contacts and Locations| Contact: Ruth A Bentler, PhD | 319.335.8723 | ruth-bentler@uiowa.edu |
| Contact: Yu-Hsiang Wu, MD, PhD | 319.335.8723 | yu-hsiang-wu@uiowa.edu |
| United States, Iowa | |
| Wendell Johnson Center, University of Iowa | Recruiting |
| Iowa City, Iowa, United States, 52242 | |
| Contact: Yu-Hsiang Wu, MD, PhD 319-335-8723 yu-hsiang-wu@uiowa.edu | |
| Principal Investigator: Ruth A Bentler, PhD | |
| Principal Investigator: | Ruth A Bentler, PhD | University of Iowa |
More Information
| Responsible Party: | University of Iowa ( Ruth A. Bentler, PhD, Clinical Trial Contract ) |
| Study ID Numbers: | 2R44DC007246-02A2 |
| Study First Received: | August 18, 2008 |
| Last Updated: | December 15, 2008 |
| ClinicalTrials.gov Identifier: | NCT00738244 History of Changes |
| Health Authority: | United States: Federal Government |
|
hearing aid algorithm wind-noise suppression |
|
Signs and Symptoms Sensation Disorders Hearing Disorders Deafness Otorhinolaryngologic Diseases |
Neurologic Manifestations Flatulence Hearing Loss Ear Diseases |
|
Signs and Symptoms Sensation Disorders Hearing Disorders Deafness Otorhinolaryngologic Diseases |
Nervous System Diseases Neurologic Manifestations Hearing Loss Ear Diseases |
