LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Hardware Design for VLSI Implementation of Acoustic Feedback Canceller in Hearing Aids

Photo by framesforyourheart from unsplash

Acoustic feedback is one of the major issues associated with the hearing aid users which limits the maximum amount of gain available for amplification and degrades the sound quality. In… Click to show full abstract

Acoustic feedback is one of the major issues associated with the hearing aid users which limits the maximum amount of gain available for amplification and degrades the sound quality. In this paper, partitioned time-domain block LMS (PTBLMS) algorithm is proposed for efficient hardware realization of acoustic feedback cancellers (AFCs) in hearing aids. A full-parallel and a folded structure is derived using the proposed PTBLMS algorithm. The folded structure utilizing the time multiplexing of convolution and correlation operation and performing them in one arithmetic unit enables better hardware utilization. A low-complexity design is employed for realization of power normalization unit (for calculating normalized convergence factor) which involves squaring and division operations. The theoretical analysis illustrates that the proposed AFC structures offer L times higher throughput rate and requires proportionately less hardware resource than the existing one where L is the block length. ASIC synthesis results reveal that the proposed folded structure involves nearly 79$$\%$$% less area-delay product and 86$$\%$$% less energy per sample compared to the existing structure.

Keywords: acoustic feedback; feedback; hardware; structure; hearing aids; design

Journal Title: Circuits, Systems, and Signal Processing
Year Published: 2018

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.