The acoustic and perceptual effects of two noise-suppression algorithms
| Autor: | Justin A. Zakis, Christi L. Wise |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Acoustics and Ultrasonics
Noise measurement Computer science Acoustics Speech Intelligibility Auditory Threshold Deafness Intelligibility (communication) Speech processing Speech Acoustics Background noise Noise Hearing Aids Hearing Arts and Humanities (miscellaneous) Colors of noise QUIET Speech Perception Noise control Humans Algorithm Algorithms |
| Zdroj: | The Journal of the Acoustical Society of America. 121:433-441 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.2401656 |
| Popis: | Internal noise generated by hearing-aid circuits can be audible and objectionable to aid users, and may lead to the rejection of hearing aids. Two expansion algorithms were developed to suppress internal noise below a threshold level. The multiple-channel algorithm's expansion thresholds followed the 55-dB SPL long-term average speech spectrum, while the single-channel algorithm suppressed sounds below 45 dBA. With the recommended settings in static conditions, the single-channel algorithm provided lower noise levels, which were perceived as quieter by most normal-hearing participants. However, in dynamic conditions "pumping" noises were more noticeable with the single-channel algorithm. For impaired-hearing listeners fitted with the ADRO amplification strategy, both algorithms maintained speech understanding for words in sentences presented at 55 dB SPL in quiet (99.3% correct). Mean sentence reception thresholds in quiet were 39.4, 40.7, and 41.8 dB SPL without noise suppression, and with the single- and multiple-channel algorithms, respectively. The increase in the sentence reception threshold was statistically significant for the multiple-channel algorithm, but not the single-channel algorithm. Thus, both algorithms suppressed noise without affecting the intelligibility of speech presented at 55 dB SPL, with the single-channel algorithm providing marginally greater noise suppression in static conditions, and the multiple-channel algorithm avoiding pumping noises. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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