Interactive effects of low-pass filtering and masking noise on word recognition. 2001

T Scott, and W B Green, and A Stuart
School of Human Communication Disorders, Dalhousie University, Halifax, Nova Scotia.

A word recognition in noise paradigm was employed to examine temporal resolution in individuals with simulated hearing loss. Word recognition scores were obtained for low-pass filtered speech (i.e., cutoff frequencies of 1000,1250, and 1500 Hz) presented in continuous and interrupted noise at signal-to-noise ratios (SNRs) of -10, 0, and 10 dB. Performance improved with increasing SNR and low-pass frequency filter settings. Generally, word recognition performance was better in the interrupted noise condition than the continuous noise condition. This effect was greatest in the -10 dB SNR condition. Since the continuous/interrupted performance difference steadily declined as a function of low-pass filter cutoff frequency, these findings suggest that one factor leading to poorer speech recognition in individuals with high-frequency hearing impairment may be their dependence on low-frequency hearing channels that are inherently poorer than high-frequency channels for temporal resolution.

UI MeSH Term Description Entries
D008144 Loudness Perception The perceived attribute of a sound which corresponds to the physical attribute of intensity. Loudness Perceptions,Perception, Loudness,Perceptions, Loudness
D008297 Male Males
D009622 Noise Any sound which is unwanted or interferes with HEARING other sounds. Noise Pollution,Noises,Pollution, Noise
D010470 Perceptual Masking The interference of one perceptual stimulus with another causing a decrease or lessening in perceptual effectiveness. Masking, Perceptual,Maskings, Perceptual,Perceptual Maskings
D011897 Random Allocation A process involving chance used in therapeutic trials or other research endeavor for allocating experimental subjects, human or animal, between treatment and control groups, or among treatment groups. It may also apply to experiments on inanimate objects. Randomization,Allocation, Random
D005260 Female Females
D006316 Hearing Loss, High-Frequency Hearing loss in frequencies above 1000 hertz. Hearing Loss, High Frequency,High-Frequency Hearing Loss
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D001309 Auditory Threshold The audibility limit of discriminating sound intensity and pitch. Auditory Thresholds,Threshold, Auditory,Thresholds, Auditory

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