access icon free On new efficient μ-law-based method for feedback compensation in hearing aids

The affine-projection-like (APL) algorithm is reported to achieve lower computations than affine-projection algorithm (APA) without compromising the steady-state performance. Further, the performance accuracy of the adaptive feedback canceller (AFC) in hearing aids is enhanced using an improved proportionate APL (IPAPL) algorithm. Two new learning algorithms are proposed for AFC, which apply the memory of previous gain factors and μ-law proportionate technique to the IPAPL, termed as memorised IPAPL (MIPAPL) and μ-law MIPAPL (MMIPAPL), respectively. In addition, a segmented approach is also suggested which offers computational advantage over MMIPAPL. The results obtained from simulation-based experiments demonstrate that the proposed methods achieve faster convergence rate than the existing methods.

Inspec keywords: feedback; filtering theory; learning (artificial intelligence); medical signal processing; hearing aids

Other keywords: adaptive feedback canceller; improved proportionate APL; memorised IPAPL; hearing aids; IPAPL; gain factors; learning algorithms; affine-projection-like algorithm; μ-law MIPAPL; feedback compensation; MMIPAPL; MIPAPL; AFC

Subjects: Prosthetics and other practical applications; Biology and medical computing; Auditory prostheses and hearing aids; Knowledge engineering techniques; Prosthetics and orthotics; Filtering methods in signal processing; Digital signal processing

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2016.0483
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content/journals/10.1049/el.2016.0483
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