期刊
IEEE-ACM TRANSACTIONS ON AUDIO SPEECH AND LANGUAGE PROCESSING
卷 23, 期 5, 页码 923-931出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASLP.2015.2409774
关键词
Adjustable; filter bank; fractional interpolation; hearing aids
资金
- Shandong Province Science and Technology Development Plan [2013GGX10103]
- National Natural Science Foundation [61201372]
- Promotive Research Foundation for Excellent Young and Middle-Aged Scientists of Shandong Province [BS2013DX042]
- Taishan Scholar Foundation [1170082963013]
The emerging demand for personalized hearing aids requires the filter bank of a hearing aid system to be capable of decomposing the sound waves in accordance with the characteristic of the patient's hearing loss. In this paper, an efficient adjustable filter bank is proposed to achieve this goal. By careful design, the number of the subbands as well as the location of the subbands can be easily adjusted by changing a 4-bit control signal. The proposed filter bank has extremely low complexity due to the adoption of fractional interpolation and the technique of symmetric and complementary filters. Only one prototype filter is needed for each of the stages, the multiple passbands generation stage and masking stage. We show, by means of examples, that the proposed filter bank can meet different needs of hearing loss cases with acceptable delay.
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