objectives: rehabilitation strategies play a pivotal role in reliving the inappropriate behaviors and improving children's performance during school. concentration and visual and auditory comprehension in children are crucial to effective learning and have drawn interest from researchers and clinicians. vestibular function deficits usually cause high level of alertness and vigilance, and p...

This paper seeks to characterize the nature, size, and range of acoustic amplitude variation in naturally produced coarticulated vowels in order to determine its potential contribution and relevance to vowel perception. The study is a partial replication and extension of the pioneering work by House and Fairbanks [J. Acoust. Soc. Am. 22, 105-113 (1953)], who reported large variation in vowel am...

The role of interaural time difference (ITD) in perceptual grouping and selective attention was explored in 3 experiments. Experiment 1 showed that listeners can use small differences in ITD between 2 sentences to say which of 2 short, constant target words was part of the attended sentence, in the absence of talker or fundamental frequency differences. Experiments 2 and 3 showed that listeners...

PURPOSE To investigate the capacity of young children and adults with normal hearing to discriminate speech on the basis of either relatively slow (temporal envelope, E) or fast (temporal fine structure, TFS) auditory cues. METHOD Vowel-consonant-vowel nonsense disyllables were processed to preserve either the E or the TFS information in 16 adjacent frequency bands. The band signals were then...

Vowels and voiced consonants of human speech and most mammalian vocalizations consist of harmonically structured sounds. The frequency contours of formants in the sounds determine their spectral shape and timbre and carry, in human speech, important phonetic and prosodic information to be communicated. Steady-state partitions of vowels are discriminated and identified mainly on the basis of har...

The role of auditory feedback in speech motor control was explored in three related experiments. Experiment 1 investigated auditory sensorimotor adaptation: the process by which speakers alter their speech production to compensate for perturbations of auditory feedback. When the first formant frequency (F1) was shifted in the feedback heard by subjects as they produced vowels in consonant-vowel...

It has been demonstrated that vowel information can be extracted from speech sounds without attention focused on them, despite widely varying non-speech acoustic information in the input. The present study tested whether even complex tones that were constructed based on F0, F1 and F2 vowel frequencies to resemble the defining features of speech sounds, but were not speech, are categorized pre-a...

Adults and infants were tested for the capacity to detect correspondences between nonspeech sounds and real vowels. The /i/ and /a/ vowels were presented in 3 different ways: auditory speech, silent visual faces articulating the vowels, or mentally imagined vowels. The nonspeech sounds were either pure tones or 3-tone complexes that isolated a single feature of the vowel without allowing the vo...

The ear’s remarkable ability to cope with noisy signals is linked to its use of a spatio-temporal mechanism that distributes information about strong spectral components across neural units whose characteristic frequencies (CFs) often span broad frequency ranges. Speech formant information is thus carried not only by channels with CFs near spectral peaks but also by adjacent channels. This pape...

Vowel perception in a /b~:b/-context of patients using a singlechannel extra-cochlear implant developed in Vienna has been studied by means of synthetic speech. Three patients were asked t o adjust the f i r s t and second formant of a synthetic vowel sound so that they perceived the sound as a given long Swedish vowel. To study the effect of training, the experiment was made a t two sessions a...