Third International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2003)

Florence, Italy
December 10-12, 2003

Comparison of Two Frequency Lowering Algorithms for Digital Hearing Aids

Alan M. Marotta, Francisco J. Fraga

National Institute of Telecommunications, Santa Rita do Sapucaí - MG, Brazil

A considerable percentage of listeners with severe hearing loss have audiograms where the losses are high for high frequencies and low for low frequencies. For these patients, lowering the speech spectrum to the frequencies where there is some residual hearing could be a good solution to be implemented for digital hearing aids. In this paper we have presented two different frequency–lowering algorithms: frequency compression and frequency shifting. Preliminary results have shown a slight better performance of the frequency shifting method relatively to the frequency compression method.

Index Terms. digital hearing aids, frequency lowering, spectral shaping

Full Paper (reprinted with permission from Firenze University Press)

Bibliographic reference.  Marotta, Alan M. / Fraga, Francisco J. (2003): "Comparison of two frequency lowering algorithms for digital hearing aids", In MAVEBA-2003, 223-226.