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The prevalence of unilateral deafness (SSD) or asymmetric hearing loss (AHL) among patients with hearing impairments ranges from 7.2% to 15.0%, indicating a relatively significant proportion.

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Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention.

J Vis Exp

December 2024

Department of Otolaryngology, Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health;

Single-sided deafness (SSD), where there is severe to profound hearing loss in one ear and normal hearing in the other, is a prevalent auditory condition that significantly impacts the quality of life for those affected. The ability to accurately localize sound sources is crucial for various everyday activities, including speech communication and environmental awareness. In recent years, bone conduction intervention has emerged as a promising solution for patients with SSD, offering a non-invasive alternative to traditional air conduction hearing aids.

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The effect of right versus left long-term single-sided deafness on sound source localization.

J Otol

July 2024

Department of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School, Beijing, 100853, China.

Purpose: To analyze the effect of right versus left long-term single-sided deafness (SSD) on sound source localization (SSL), discuss the necessity of intervention and treatment for SSD patients, and analyze the therapeutic effect of long-term unilateral cochlear implantation (UCI) from the perspective of SSL.

Methods: This study included 25 patients with SSD, 11 patients with UCI, and 30 participants with normal hearing (NH). Their SSL ability was tested by obtaining their average root mean square (RMS) error values of SSL test.

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Interaural level difference sensitivity in neonatally deafened rats fitted with bilateral cochlear implants.

Sci Rep

December 2024

Neurobiological Research Laboratory, Section for Experimental and Clinical Otology, Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Medical Center - University of Freiburg, Killianst. 5, 79106, Freiburg im Breisgau, Germany.

Bilateral cochlear implant (CI) patients exhibit significant limitations in spatial hearing. Their ability to process interaural time differences (ITDs) is often impaired, while their ability to process interaural level differences (ILDs) remains comparatively good. Clinical studies aiming to identify the causes of these limitations are often plagued by confounds and ethical limitations.

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Background: With bilateral hearing loss, the main problems for the patient are speech understanding in noise and, especially in asymmetrical hearing loss, an inability to correctly localize sound sources. There are multiple methods of treatment and rehabilitation for people with conductive hearing loss, and one of them is to use an active bone conduction implant. This case study is designed to evaluate the auditory benefits and sound localization accuracy with active bilateral bone conduction implants-in comparison to unilateral ones-in a patient with congenital bilateral conductive hearing loss caused by a congenital malformation.

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