Eighty normally hearing children (ages 4 to 8) judged the clarity of sentences that were systematically bandpass-filtered to increase intelligibility. Study of 10 subjects at each age found that children 5 years or older were able to make reliable clarity judgements using paired comparisons or category rating; however, the method of paired…

This study examined identification and discrimination of initial bilabial stop consonants differing in voicing by 10 9-year-old children with a history of severe otitis media with effusion (OME). Long-term effects of OME were found for both identification and discrimination performance. In cases of language impairment with early OME, no additional…

We investigated how different psychophysical procedures affect frequency discrimination performance in children. Four studies used a design in which listeners heard two tone pairs and had to identify whether the first or second pair contained a higher frequency target tone. Thresholds for 6-and 7-year-olds were higher than those for 8- and…

This study aimed to (a) investigate the effect of using a hearing aid in conjunction with a cochlear implant in opposite ears on speech perception in quiet and in noise, (b) identify the speech information obtained from a hearing aid that is additive to the information obtained from a cochlear implant, and (c) explore the relationship between…

This paper describes three experiments which demonstrated the presence of binaural perception abilities (the ability to use both ears) in 4-month-old but not in 2-month-old infants. All of the experiments employed a visual fixation habituation-dishabituation paradigm in which infants were given a series of visual fixation trials while binaural…

Three groups of traditional houses were insulated against aircraft noise by double glazing and installing sound attenuating ventilator units. For upper floor rooms of two story houses, overall insulations of 35-40 dB were obtainable, providing transmission through the roofs and down flues were also reduced. The noise levels caused by ventilator…

Results of this study suggest that, for primary level children, the natural'' perceptual unit of spoken language is the syllable, not the phoneme. (Authors)

Research for this report supported by grants from the National Research Council and the Medical Research Council of Canada. (RS)

Argues that knowing how infants process speech is a prerequisite to any definition of linguistic experience and therefore, the discrimination paradigm does not provide a test for the effect of experience on infants' speech discrimination. Outlines conditions to be met in order to conclude an effect of experience. (EKN)

Three experiments studied the perception of tone sequences. Ratings of perceived structure and ease of recognition in transposition were both influenced by harmonic progression, the contour, and the excursion or repetition pattern within the sequence. Results are described in terms of the abstraction and analysis of levels of pitch relations.…

This study examined the effects of the cochlear hearing loss of 12 adults on two measures of sequential processing that rely on spectro-temporal information: a gap-detection discrimination task and a melody recognition task. It was concluded that cochlear hearing loss deleteriously affects the processes underlying perceptual organization of…

Children with language learning problems (N=151) and normally learning children (N=143) were tested on fine-grained auditory discrimination tasks that required responding to small acoustic differences. Performance on the auditory tasks was highly correlated with group placement suggesting that fine-grained auditory discrimination makes a major…

Used data from infants in operant head-turning procedure to examine effects of structure and redundancy of speech context on discovery of two target syllables. Clustering strategy, which presupposes basic element of perception and aggregates these elements to form units, may complement bracketing strategy, which presupposes endpoint cues and…