Fig 9 - uploaded by Maristela Costa
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Source publication
PURPOSE:
to evaluate and compare the performance of elderly people with and without cochlear dead regions in speech recognition tests, in silence and in noise, using hearing aids with and without the activation of the nonlinear frequency compression algorithm.
METHODS:
38 elderly people with mild to moderate hearing loss and descending configurati...
Context in source publication
Context 1
... of the travelling wave in the human cochlea is shown in Fig. 18 for stimulation by a tone of 200 cps. The envelope of the vibration amplitude has a maximum, but the maximum is relatively flat. This flatness indicates that very little mechanical frequency analysis is done by the inner ear. This conclusion is confirmed for the higher frequencies in Fig. 19 which shows the displacement of the maximum of the envelope for different ...
Similar publications
Background noise poses a great challenge to the speech recognition capability of hearing-impaired patients fitted with hearing aid (HA) devices. In an HA system, a speech enhancement unit is generally employed to enhance the signal-to-noise ratio (SNR) of noisy speech in order to yield better speech understanding for HA users in noisy conditions. H...
Citations
... O teste Listas de Sentenças em Português Brasileiro (LSP-BR) vem sendo amplamente utilizado em pesquisas e na prática clínica, com diferentes objetivos de avaliação e em populações diversas (14,15,16,17,18,19,20,21,22,23,24) . ...
Purpose
To develop Brazilian Portuguese Dichotic Sentence List Test, check its applicability and propose an application protocol for auditory processing assessment.
Methods
The lists of sentences were taken from the original material, analyzed in detailed and adapted to form the new test. To compose pairs of sentences with as much of the same duration as possible, the duration of each sentence was statistically analyzed within the same list and among lists. The lists were combined in increasing order of length, within each list; and combinations of the lists were formed according to the length of sentences, resulting in 42 different sets of lists. Then, the test was performed with 42 normal hearing individuals. Individuals were instructed on how to answer: initially, they should repeat the sentences presented to both ears (attention divided between the right and the left ears). Then, the steps for the right ear phrases (attention directed to the right ear), and finally for the left ear (attention directed to the left ear) were performed.
Results
The new material was composed as follows: track 1, pure tone calibration; track 2, modified 1A list; and tracks 3 to 44, the 42 possible combinations among the lists. After the test was applied, an application protocol was suggested.
Conclusion
The Brazilian Portuguese Dichotic Sentence List Test was developed and proved to be an instrument that can be used in adults. Therefore, a protocol was proposed with two different combinations of lists and presentation sequence for auditory processing assessment.
