Single-sided deafness affects language and auditory development - a case-control study.

OBJECTIVES: To examine auditory, linguistic and cognitive outcomes of children with single-sided deafness (SSD). An increasing body of research suggests that children with SSD lag behind with respect to their normal hearing (NH) peers. In this study, we tap into certain developmental skills. DESIGN: Case-control study. PARTICIPANTS: Twenty-one children with SSD between 5 and 15 years of age participated. Per child with SSD, two NH control children were matched on age and gender. OUTCOME MEASURES: Morphology, syntax and vocabulary were examined, and performance was assessed in depth by focusing on subskills and type of errors made. Furthermore, tests of short-term and working memory were conducted, and aspects of hearing disability were assessed by means of the speech spatial and qualities of hearing questionnaire (SSQ). MAIN RESULTS: The children with SSD lagged behind in their scores on the three language tests and showed some differences to the NH group concerning type of errors and difficulty of the several subskills. Furthermore, scores on the SSQ indicated that in daily life, the children with SSD experience problems in spatial hearing and in understanding speech in noisy situations and that the effort they have to put into listening and in understanding speech is considerably greater than in NH children. CONCLUSIONS: This study showed differences between children with SSD and NH children on several language skills and on auditory behaviour. Possibly, early intervention could prevent such language difficulties and minimise problems with spatial hearing and speech understanding.

Long-term audiological follow-up of children with congenital cytomegalovirus.

OBJECTIVE: To evaluate the audiological outcome of children with congenital cytomegalovirus infection. METHODOLOGY: In a prospective study, the hearing of 98 congenitally cytomegalovirus-infected children born between January 2003 and July 2009 was systematically evaluated until the age of six using the Flemish CMV protocol. Symptomatic children with hearing loss at birth were treated with ganciclovir, if parents consented. RESULTS: Seventy children passed initial screening, 28 had unilateral or bilateral hearing loss. In the normal hearing group, one asymptomatic and two symptomatic children developed late-onset hearing loss. Eight children in the group with hearing loss at birth received ganciclovir. Nine symptomatic and 11 asymptomatic children did not receive ganciclovir. In the treated group, 37.5% of the children had stable hearing loss, and 37.5% had progressive and/or fluctuating hearing loss. First progression or fluctuation always occurred after the age of one year. The hearing threshold improved in 25.0%. The improvement took place during or shortly after treatment. Hearing loss remained stable in 33.3% of the untreated symptomatic children, while progression or fluctuation occurred in 55.5%. In the asymptomatic group, hearing loss was most commonly stable (63.6%). The first change in the hearing threshold was almost always detected before the age of one year in both untreated groups. CONCLUSIONS: Hearing loss caused by congenital cytomegalovirus infection cannot be defined unequivocally either with respect to the level of hearing loss or its evolution over time. Treating symptomatic children with ganciclovir leads to a better prognosis during the first year of life, after which progression or fluctuation again becomes more likely. However, overall, progression is more common in the untreated symptomatic group. Asymptomatic children with SNHL are more likely to have a stable hearing status.

Digital hearing aids and future directions for hearing aids.

In recent years many technical evolutions have been applied in hearing aids. In this paper differences between analog, programmable and fully digital hearing aids, the basic and supplementary functions of a hearing aid, and some important issues and future directions for digital hearing aids will be mentioned.