The purpose of this study was to determine whether the compression circuit of a hearing aid could be activated by a high frequency biasing tone such that its output for a transient stimulus could be made to approximate that of a continuous tone alone. Sufficient compression activation by a transient stimulus would mean that this type of hearing aid could be used in obtaining aided ABR measurements, since transient stimuli are commonly used for this procedure. Four hearing aids were used, and transient or continuous stimuli were introduced either alone or in combination with an 8 or 10 kHz biasing tone. The biasing tone was either held at one constant level or varied in intensity along with the transient or continuous signal.

This investigation was conducted to determine whether the removal of hearing aids from these children for eighteen hours (+ 1/2 hour and including sleep time) would result in reduced speech intelligibility as perceived by a panel of listening judges who were unfamiliar with the speech of the deaf.

Professional research project (Au.D.)--University of South Florida, 2000. / Title from PDF of title page. / Document formatted into pages; contains 46 pages. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: In the present health care environment, there is an increased demand for audiologists to measure the outcomes of hearing aid intervention. In addition to the more traditional objective outcome measures, many subjective outcome measures have been developed in the last 20 years. Two such subjective outcome measures are the Abbreviated Profile of Hearing Aid Benefit (APHAB) and the Hearing Handicap Inventory for the Elderly (HHIE). These instruments consist of a series of pre-selected questions that may or may not be applicable to an individual. An alternative to the pre-selected question format is an open format design that allows the person with a hearing loss to designate areas of concern to them. One subjective outcome measure that uses this format is the Client Oriented Scale of Improvement (COSI) developed by Dillon and his colleagues in Australia. The COSI has been validated and may be useful for oversight with multi-clinician or for multi-clinic systems. The purpose of this study was to address tthe potential of the COSI for such oversight. Specifically, the study examined the inter-observer agreement of the classification of individually identified situations into general categories. The study also re-examined the clinical utility of the COSI as an outcome measure in individual hearing aid fittings. The results demonstrated very good inter-observer agreement for the classification of individually identified situations. In addition, the study supported the usefulness as a clinical outcome measure that had been found by Dillon and his colleagues in Australia. These results indicate that the COSI has potential for oversight of the outcomes of hearing aid intervention in hearing aid delivery organizations. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Thesis (Ph. D. in Hearing and Speech Sciences)--Vanderbilt University, Dec. 2009. / Title from title screen. Includes bibliographical references.

Introduction: Despite the advantages of using a hearing aid (HA), only 1 out of 5 individuals who could benefit from a (HA) actually use one (World Health Organization, 2012). If an individual does not use a HA then it may impact on their quality of life, as well as others around them (Chia et al., 2007). Therefore it is important to understand why individuals do not use HAs after obtaining them. To date, there has been no study that investigates the reasons for HA disuse in the New Zealand population. Methods: Two groups of adults with hearing impairment were recruited: HA users (N = 35) and HA disusers (N = 35). Six self-report questionnaires, three audiometric tests and two other body function measures were compared between the groups. Results: Several variables differentiated HA users from disusers, these significant variables were: cognition, understanding speech in noise, acceptance of noise, age at testing, education, hearing assistance technology (HAT) use, HA satisfaction, self-efficacy, accepted need, application for HA subsidy, HA outcomes, stages-of-change, perceived environmental influence, follow-up support and hearing related activity limitations/participation restrictions (AL/PR). Discussion: The clinical value of identifying factors related to HA disuse is so clinicians can identify “red flags” for disuse before the client stops using their HAs. By identifying these red flags, rehabilitation can be tailored around the clients’ needs; before the negative consequences of an untreated hearing impairment is felt.

To date, very few studies have been conducted focusing on ratings of music and music listening experience of hearing aid (HA) users. This study aimed to collect more detailed and descriptive information via a questionnaire, on the music listening experience and ratings of musical sounds from postlingually deafened adults. The following hypotheses were posed: (i) ratings for music from HA users who have been assessed for a cochlear implant (HA-CI group) will be worse than those who have not been assessed for a CI (HA-NCI group); and (ii) HA users with a moderate or worse hearing loss (Moderate+ subgroup) will provide lower ratings for music than those with a mild hearing loss (Mild subgroup). A questionnaire by She (2008), was modified for this study, and subsequently called the University of Canterbury Music Listening Questionnaire – HA version (UCMLQ_HA). The questionnaire was divided into the following seven sections: music listening and music background, sound quality ratings, music styles, music preferences, music recognition, factors affecting music listening enjoyment, and a music training programme. Thirteen HA-CI recipients and 98 HA-NCI recipients returned the questionnaire. The HA-NCI group was divided into two subgroups: mild hearing loss (n = 51), and moderate or worse hearing loss (Moderate+; n = 47). Essentially findings were consistent with hypothesis one, but only partially consistent with hypothesis two. The HA-CI group provided lower ratings for ‘pleasantness’ and ‘naturalness’ of instruments (p = 0.007), and found music styles to be less ‘pleasant’ (p < 0.001) than the HA-NCI group. For musical styles, the HA-CI group preferred solo performers whereas the HA-NCI group preferred groups of performers. In addition to ratings of music, the HA-CI group provided significantly lower ratings for music listening (p = 0.001), and overall music enjoyment (p = 0.021) than the HA-NCI group. For the comparisons between the Mild and Moderate+ subgroups, the Mild subgroup found Instruments to sound significantly ‘less noisy’ (p < 0.001) and ‘less sharp’ (p < 0.001) than the Moderate+ subgroup. The Moderate+ subgroup provided higher ratings for overall enjoyment of listening to music with HAs than the Mild subgroup (p = 0.044). Both subgroups rated the drum kit (the lowest rated Instrument) to be significantly less pleasant and less natural than all other Instruments. It was also found that all musical styles were significantly more pleasant than Pop/Rock. There were similarities between the groups for music preferences; the male singer was significantly preferred over female singers (p = 0.021), and low-pitched instruments were significantly preferred over high-pitched instruments (p = 0.04). Classical music was also selected as the style that sounded the best with their HAs and listened to the most often. Almost all of the respondents indicated that they would like music in general to sound it would to those with normal hearing (97.1%). Close to 30% indicated that they would be interested in an MTP and would like it to focus on a wide range of music and feature commonly known tunes. In addition, training sessions should consist of two 30 minute sessions per week. Overall this study indicates that ratings of music differ with level of hearing loss to some degree. The general consensus was that music did not sound as they would expect it to sound to a person with normal hearing, and that respondents would like to enjoy listening to music more.

To date, very few studies have been conducted focusing on ratings of music and music listening experience of hearing aid (HA) users. This study aimed to collect more detailed and descriptive information via a questionnaire, on the music listening experience and ratings of musical sounds from postlingually deafened adults. The following hypotheses were posed: (i) ratings for music from HA users who have been assessed for a cochlear implant (HA-CI group) will be worse than those who have not been assessed for a CI (HA-NCI group); and (ii) HA users with a moderate or worse hearing loss (Moderate+ subgroup) will provide lower ratings for music than those with a mild hearing loss (Mild subgroup). A questionnaire by She (2008), was modified for this study, and subsequently called the University of Canterbury Music Listening Questionnaire – HA version (UCMLQ_HA). The questionnaire was divided into the following seven sections: music listening and music background, sound quality ratings, music styles, music preferences, music recognition, factors affecting music listening enjoyment, and a music training programme. Thirteen HA-CI recipients and 98 HA-NCI recipients returned the questionnaire. The HA-NCI group was divided into two subgroups: mild hearing loss (n = 51), and moderate or worse hearing loss (Moderate+; n = 47). Essentially findings were consistent with hypothesis one, but only partially consistent with hypothesis two. The HA-CI group provided lower ratings for ‘pleasantness’ and ‘naturalness’ of instruments (p = 0.007), and found music styles to be less ‘pleasant’ (p < 0.001) than the HA-NCI group. For musical styles, the HA-CI group preferred solo performers whereas the HA-NCI group preferred groups of performers. In addition to ratings of music, the HA-CI group provided significantly lower ratings for music listening (p = 0.001), and overall music enjoyment (p = 0.021) than the HA-NCI group. For the comparisons between the Mild and Moderate+ subgroups, the Mild subgroup found Instruments to sound significantly ‘less noisy’ (p < 0.001) and ‘less sharp’ (p < 0.001) than the Moderate+ subgroup. The Moderate+ subgroup provided higher ratings for overall enjoyment of listening to music with HAs than the Mild subgroup (p = 0.044). Both subgroups rated the drum kit (the lowest rated Instrument) to be significantly less pleasant and less natural than all other Instruments. It was also found that all musical styles were significantly more pleasant than Pop/Rock. There were similarities between the groups for music preferences; the male singer was significantly preferred over female singers (p = 0.021), and low-pitched instruments were significantly preferred over high-pitched instruments (p = 0.04). Classical music was also selected as the style that sounded the best with their HAs and listened to the most often. Almost all of the respondents indicated that they would like music in general to sound it would to those with normal hearing (97.1%). Close to 30% indicated that they would be interested in an MTP and would like it to focus on a wide range of music and feature commonly known tunes. In addition, training sessions should consist of two 30 minute sessions per week. Overall this study indicates that ratings of music differ with level of hearing loss to some degree. The general consensus was that music did not sound as they would expect it to sound to a person with normal hearing, and that respondents would like to enjoy listening to music more.

Thesis (M. Communication Pathology)--University of Pretoria, 2006. / Summary in English and Afrikaans. Includes bibliographical references.

Thesis (Ph.D.)--University of Melbourne, Dept. of Otolaryngology, 2007. / Typescript. Includes bibliographical references (leaves 210-221).

Diss. (sammanfattning) Stockholm : Karol. inst., 2004. / Härtill 4 uppsatser.