Advantages of a non-linear frequency compression algorithm in noise

A multichannel non-linear frequency compression algorithm was evaluated in comparison to conventional amplification hearing aids using a test of speech understanding in noise (Oldenburger Satztest—OLSA) and subjective questionnaires. The new algorithm compresses frequencies above a pre-calculated cu...

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Bibliographic Details
Published in:European archives of oto-rhino-laryngology Vol. 267; no. 7; pp. 1045 - 1053
Main Authors: Bohnert, Andrea, Nyffeler, Myriel, Keilmann, Annerose
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer-Verlag 01.07.2010
Springer
Subjects:
Adolescent
Adult
Aged
Algorithms
Audiometry, Pure-Tone
Biological and medical sciences
Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology
Female
Head and Neck Surgery
Hearing Aids
Hearing Loss, Sensorineural - physiopathology
Hearing Loss, Sensorineural - rehabilitation
Humans
Male
Medical sciences
Medicine
Medicine & Public Health
Middle Aged
Neurosurgery
Non tumoral diseases
Otology
Otorhinolaryngology
Otorhinolaryngology. Stomatology
Speech Perception
Surveys and Questionnaires
Treatment Outcome
Multichannel non-linear frequency compression algorithm
Profound hearing loss
Speech understanding in noise
High-frequency audibility
Subjective questionnaires
Compression
Verbal comprehension
Questionnaire
Noise
Auditory disorder
ENT
Algorithm
Hearing loss
Advantage
ENT disease
High frequency
ISSN:0937-4477, 1434-4726, 1434-4726
Online Access:Get full text
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Summary:A multichannel non-linear frequency compression algorithm was evaluated in comparison to conventional amplification hearing aids using a test of speech understanding in noise (Oldenburger Satztest—OLSA) and subjective questionnaires. The new algorithm compresses frequencies above a pre-calculated cut off frequency and shifts them to a lower frequency range, thereby providing high-frequency audibility. Low-frequencies, below the compression cut off frequency, are amplified normally. This algorithm is called SoundRecover (SR). In this study, 11 experienced hearing aid users with a severe to profound sensorineural hearing loss were tested. Seven subjects showed enhanced levels of understanding in noise (OLSA) using frequency compression. However, 4 out of the 11 subjects could not benefit from the high-frequency gain. Evaluation using questionnaires demonstrated an increased level of satisfaction after 2 months of experimental devices wearing ( p  = 0.08) and after 4 months of wearing ( p  = 0.09), respectively, compared to conventional hearing instruments.
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ISSN:0937-4477
1434-4726
1434-4726
DOI:10.1007/s00405-009-1170-x