OBJECTIVES The purpose of the study was to examine recognition of degraded melodic stimuli in dichotic listening with or without frequency-place mismatch. DESIGN Melodic stimuli were noise vocoded with various number-of-channel conditions in a dichotic and monaural processor. In the dichotic zipper processor, the odd-indexed channels were tonotopically matched and presented to the left ear wh...

Subjects gave magnitude estimates of the loudness of monaurally presented pure tones (1000, 1040, and 1080 Hz) and dichotically presented pairs of tones (1000 Hz to one ear plus 1040 or 1080 Hz to the other). For each monaural frequency or dichotic pair, the magnitude estimates approximated power functions of sound pressure; moreover, the monaural and dichotic loudness functions were separated ...

We compared self-reported handicap (Hearing Handicap Inventory for the Elderly, HHIE) scores before and after a 6-week period of hearing aid use in subjects drawn from a pool of 115 elderly persons with hearing impairment. Study patients (PTs) were divided into two categories according to whether scores on a dichotic listening test (Dichotic Sentence Identification Test, DSI) were normal or abn...

Thirteen adult patients were operated on for symptomatic arachnoid cysts in the left temporal fossa; seven with an internal shunt procedure during local anaesthesia, and five with a craniotomy with fenestration of the cyst to the basal cisterns. In one patient, an initial internal shunt was transformed to a cystoperitoneal shunt. After surgery, all patients experienced relief of symptoms. Reduc...

Modern physiologically based models of the binaural system incorporate internal delay lines in the pathways from left and right peripheries to central processing nuclei. Different binaural models for the formation of dichotic pitch employ these delay lines in different ways. Consequently, the different models make different predictions for the relative strengths of dichotic pitches made with pa...

BACKGROUND Exposure to hand-held vibrating tools may cause the hand-arm vibration syndrome (HAVS). The aim was to study the test-retest reliability of hand and muscle strength tests, and tests for the determination of thermal and vibration perception thresholds, which are used when investigating signs of neuropathy in vibration exposed workers. METHODS In this study, 47 vibration exposed work...

Dichotic listening to verbal stimuli results in a right ear advantage (REA), indicating a left hemisphere processing superiority. The magnitude of the REA can be modulated by instructions to direct attention to the left or right ear stimulus. A previous study from our laboratory showed that presenting a prime syllable before the presentation of the dichotic syllables increases reports of the no...

Auditory steady-state responses (ASSRs) were elicited by presenting single or multiple, 77-105 Hz amplitude-modulated 0.5, 1, 2, and 4 kHz tones to one or both ears. Objectives of this study were to (i) replicate and extend previous multiple ASSR studies in a quiet double-walled sound booth, and (ii) discover differences (if any) between thresholds assessed in monotic and dichotic conditions, w...

Dichotic word recognition was evaluated in free-recall, directed-attention right, and directed-attention left response conditions. All participants were right-handed and included a group of young adults with normal hearing and two groups of older adults with sensorineural hearing loss. Dichotic word recognition performance was best for young adults and decreased for each older group. A right-ea...