Fördelar med högre ”Maximal Force Output” i benförankrade hörapparatsystem: en crossover-studie
Sammanfattning: Objective: To investigate how higher maximum force output (MFO) in Bone Anchored Hearing Systems affects the perceived benefit, subjective experience of sounds as well as hearing outcomes in subjects with mixed hearing loss, seen in relation to a smaller sound processor with lower MFO.Material and method: Prospective, randomized cross-over study (ABA). Nineteen experienced users of bone anchored hearing system and with a mixed hearing loss were included in the study. Two sound processors with different design and MFO were evaluated in the study, device A: Oticon Medical Ponto 3 and device B: Oticon Medical Ponto 3 Super Power. Outcome measurements were speech recognition in noise at different signal to noise ratios, aided thresholds, and questionnaires.Results: Speech intelligibility test showed significant improvement using device B. Moreover, SSQ12-C showed a significant larger perceived benefit with device B concerning localization, distance and movement of the sound source. At the end of the study, eleven out of nineteen participants (58%) chose to keep device A for further use, main reasons were size of the sound processor and a more comfortable sound experience.Conclusion: Higher MFO in bone anchored hearing sound processors allows improvement of speech intelligibility in sound demanding environments. Additionally, higher MFO is perceived as beneficial to receive spatial information. However, when choosing in-between two sound processors design and size of the device play an important role for many users.
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