A 16-Channel Low-Power Nonuniform Spaced Filter Bank Core for Digital Hearing Aids

Chong, Kwen-Siong; Gwee, Bah-Hwee; Chang, Joseph S.

doi:10.1109/tcsii.2006.881821

Cited by 47 publications

(25 citation statements)

References 12 publications

(12 reference statements)

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“…These audiograms include mild hearing loss, moderate hearing loss, and severe-to-profound hearing loss. These audiograms also appear in [11], but they considered fitting the audiograms only, and not their prescriptions.…”

Section: Table I Exploration Results Of Filtermentioning

confidence: 99%

“…Although normal human ears are not sensitive to phase-delay, designing filter bank with exact linear phase [11], [12], [14], of-fers some advantages regarding the development of advanced binaural hearing aids, which not only target at compensating hearing losses, but also music signals and sound localization for binaural hearing aids. …”

Section: Multirate Ifir Quasi-ansi Filter Bankmentioning

confidence: 99%

“…The power consumed by AFB is approximately 27% of the total power in [6]. band [9]- [11], critical-band [12], symmetric-band [13], and 1/3-octave-band [14] filter banks. A 7-band octave filter bank was designed in [9] and [10] using the interpolated FIR (IFIR) filter technique.…”

Section: Introductionmentioning

confidence: 99%

“…A 7-band octave filter bank was designed in [9] and [10] using the interpolated FIR (IFIR) filter technique. Lian and Wei [11] proposed an 8-band octave filter bank with the IFIR and frequency-response masking (FRM) techniques to reduce the computational complexity. Chong et al designed a critical-band filter bank to match well human percep-tion [12].…”

Section: Introductionmentioning

confidence: 99%

“…However, the irregular property of the critical bands makes their implementation difficult. In addition to [11], Wei and Lian proposed a 16-band symmetric filter bank [13] that guarantees high frequency resolution at both high and low fre-quency regions but rather low resolution near to . Kuo et al recently proposed an efficient 18-band ANSI S1.11 1/3-octave filter bank [14].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Low-Power High-Speed Amplification Using FilterBank for Digital Hearing AIDS

Rajalakshmi¹,

Gunasekaran²

2016

IJMSR

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-The ANSI S1.11 1/3-octave filter bank is suitable for digital hearing aids, but its large group delay and high compu-tational complexity complicate matters considerably. This study presents a 10-ms 18-band quasi-ANSI S1.11 1/3-octave filter bank for processing 24 kHz audio signals. We first discuss a filter order optimization algorithm to define the quasi-ANSI filters. The group delay constraint of filters is limited to 10 ms. The proposed design adopts an efficient prescription-fitting algorithm to reduce inter-band interference, enabling the proposed quasi-ANSI filter bank to compensate any type of hearing loss (HL) using the NAL-NL1 or HSE prescription formulas. Simulation results re-veal that the maximum matching error in the prescriptions of the mild HL, moderate HL, and severe-to-profound HL is less than 1.5 dB. This study also investigates the complexity-effective multirate IFIR quasi-ANSI filter bank. For an 18-band digital hearing aid with a 24 kHz sampling rate, the proposed architecture eliminates approximately 93% of the multiplications and up to 74% of the storage elements, compared with a parallel FIR filters architec-ture. The proposed analysis filter bank (AFB) was designed in UMC 90 nm CMOS high-VT technology, and on the basis of postlayout simulations, it consumes 73 W. By voltage scaling (to 0.6 V), the simulation results show that the power consumption decreases to 27 W, which is approximately 30% of that consumed by the most energy-efficient AFB available in the literature for use in hearing aids.Index Terms-Filter bank, hearing aid, low group delay.

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Section: Table I Exploration Results Of Filtermentioning

confidence: 99%

Section: Multirate Ifir Quasi-ansi Filter Bankmentioning

confidence: 99%