Speech intelligibility and sentence recognition memory in noise

2014 ◽  
Vol 136 (4) ◽  
pp. 2241-2241
Author(s):  
Rajka Smiljanic
Keyword(s):  
Recognition Memory ◽  
Speech Intelligibility ◽  
Sentence Recognition

Comparative Performance of an Adaptive Directional Microphone System and a Multichannel Noise Reduction System

2006 ◽  
Vol 17 (04) ◽  
pp. 241-252 ◽  
Author(s):  
Kevin C.P. Yuen ◽  
Anna C.S. Kam ◽  
Polly S.H. Lau
Keyword(s):  
Noise Reduction ◽  
Speech Intelligibility ◽  
Hearing Aid ◽  
Recognition Performance ◽  
Comparative Performance ◽  
Sentence Recognition ◽  
Side Condition ◽  
Directional Microphone ◽  
Reduction System ◽  
Front Condition

The amplification outcomes of two hearing aid prescriptions, NAL-NL1 and Digital Perception Processing (DPP), of nine moderate to moderately severe hearing-impaired adults were compared in the same digital hearing instrument. NAL-NL1 aims at optimizing speech intelligibility while amplifying the speech signal to a normal overall loudness level (Dillon, 1999). DPP focuses on restoring loudness based on normal and impaired cochlear excitation models (Launer and Moore, 2003). In this comparison, DPP resulted in better sentence recognition performance than the NAL-NL1 algorithm in the signal-front/noise-side condition, and the two prescriptions gave similar performance in the signal-front/noise-front condition. Subjective evaluations by the participants using the Abbreviated Profile for Hearing Aid Benefit and sound quality comparisons did not give conclusive results between the two prescriptions.With each hearing aid prescription, the ability of the hearing aid circuitry to reduce the effects of noise was evaluated by a sentence-in-noise test in three conditions: (1) adaptive directional microphone (DAZ), (2) multichannel noise reduction system (FNC), and (3) a combination of FNC and DAZ (FNC + DAZ). In the signal-front/noise-side condition, DAZ and FNC + DAZ gave better performance than FNC in nearly all participants, whereas in the signal-front and noise-front evaluation, the conditions revealed no significant differences.

Enhancing Speech Intelligibility: Interactions Among Context, Modality, Speech Style, and Masker

2014 ◽  
Vol 57 (5) ◽  
pp. 1908-1918 ◽  
Author(s):  
Kristin J. Van Engen ◽  
Jasmine E. B. Phelps ◽  
Rajka Smiljanic ◽  
Bharath Chandrasekaran
Keyword(s):  
Visual Information ◽  
Speech Intelligibility ◽  
Semantic Context ◽  
Visual Input ◽  
Conversational Speech ◽  
Clear Speech ◽  
Sentence Recognition ◽  
Speech In Noise ◽  
Masking Condition ◽  
Speech Cues

Purpose The authors sought to investigate interactions among intelligibility-enhancing speech cues (i.e., semantic context, clearly produced speech, and visual information) across a range of masking conditions. Method Sentence recognition in noise was assessed for 29 normal-hearing listeners. Testing included semantically normal and anomalous sentences, conversational and clear speaking styles, auditory-only (AO) and audiovisual (AV) presentation modalities, and 4 different maskers (2-talker babble, 4-talker babble, 8-talker babble, and speech-shaped noise). Results Semantic context, clear speech, and visual input all improved intelligibility but also interacted with one another and with masking condition. Semantic context was beneficial across all maskers in AV conditions but only in speech-shaped noise in AO conditions. Clear speech provided the most benefit for AV speech with semantically anomalous targets. Finally, listeners were better able to take advantage of visual information for meaningful versus anomalous sentences and for clear versus conversational speech. Conclusion Because intelligibility-enhancing cues influence each other and depend on masking condition, multiple maskers and enhancement cues should be used to accurately assess individuals' speech-in-noise perception.

Benefits of Syllabic Input Compression for Users of Cochlear Implants

2002 ◽  
Vol 13 (01) ◽  
pp. 014-024 ◽  
Author(s):  
Hugh J. McDermott ◽  
Katherine R. Henshall ◽  
Colette M. McKay
Keyword(s):  
Cochlear Implants ◽  
Input Signal ◽  
Speech Intelligibility ◽  
Average Level ◽  
Signal Compression ◽  
Low Level ◽  
Sentence Recognition ◽  
Percentage Points ◽  
Low Levels

Ten users of multielectrode cochlear implants participated in an evaluation of the perceptual effects of input-signal compression. A syllabic compressor was introduced into the microphone circuit of Spectra-22 or SPrint sound processors. The post-compression gain was adjusted to provide similar loudness for speech at an average level of 65 dBA with compression either enabled or disabled. Sentence recognition was measured at three levels. Averaged across all listeners, statistically significant score increases were obtained at each level with compression enabled (45 dBA: 19.6 percentage points, p < .0001; 55 dBA: 16.6 percentage points, p < .0001; 70 dBA: 3.1 percentage points, p = .031). A test of speech intelligibility in noise showed no significant effect of compression. Generally, participants in the trial reported improved perception of low-level sounds with compression, although a few disliked the increased loudness of some background noises. Some participants suggested that the ability to enable or disable compression with a manual switch would be helpful. Overall, the results show that input compression can improve the performance of these sound processors for users of cochlear implants, especially when listening to speech at low levels.

scholarly journals Modality of presentation and blocking in sentence recognition memory

1977 ◽  
Vol 5 (1) ◽  
pp. 111-115 ◽  
Author(s):  
Paul W. Flagg ◽  
Allan G. Reynolds
Keyword(s):  
Recognition Memory ◽  
Sentence Recognition
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