Spatial impression refers to the attributes of subjective space beyond localization. In the field of auditorium acoustics, auditory spatial impression is often divided into ‘apparent source width’, ‘envelopment’ and sometimes ‘intimacy’. In separate experiments, this study considers how visual and auditory spatial impression vary within two auditoria, and hence similarities between these two se...

A diffuse sound field was created in a reverberation chamber. Broadband impulsive sounds with different temporal density of the impulses were employed. Tests were performed with listeners in the reverberant chamber as well as with the binaural recordings of the reverberant chamber tests. The results of these tests showed a strong lateral concentration of the auditory events when a low temporal ...

OBJECTIVE Binaural beat sensations depend upon a central combination of two different temporally encoded tones, separately presented to the two ears. We tested the feasibility to record an auditory steady state evoked response (ASSR) at the binaural beat frequency in order to find a measure for temporal coding of sound in the human EEG. METHODS We stimulated each ear with a distinct tone, bot...

INTRODUCTION The purpose of this pilot study was to explore the potential for the use of binaural auditory beat stimulation to reduce the symptom of inattention in children and adolescents with attention-deficit/hyperactivity disorder. METHODS This pilot study had a randomized, double-blind, placebo-controlled design. Twenty participants were randomly assigned to listen to either an audio pro...

A mathematical model was developed for exploring the sensitivity of low-frequency inferior colliculus (IC) neurons to interaural phase disparity (IPD). The formulation involves a firing-rate-type model that does not include spikes per se. The model IC neuron receives IPD-tuned excitatory and inhibitory inputs (viewed as the output of a collection of cells in the medial superior olive). The mode...

Pre-operative anxiety is common and often significant. Ambulatory surgery challenges our pre-operative goal of an anxiety-free patient by requiring people to be 'street ready' within a brief period of time after surgery. Recently, it has been demonstrated that music can be used successfully to relieve patient anxiety before operations, and that audio embedded with tones that create binaural bea...

A binaural beat is a beat phenomenon that is generated by the dichotic presentation of two almost equivalent pure tones but with slightly different frequencies. The brain responses to binaural beats remain controversial; therefore, the aim of this study was to investigate theta activity responses to a binaural beat by controlling factors affecting localization, including beat frequency, carrier...

More than 100 years ago Lord Rayleigh postulated the Duplex Theory of auditory localisation. Low frequency and wide-band sounds are localised based on interaural time differences (ITDs), while high frequency sounds are localised by interaural level differences (ILDs) [1, 2]. In natural situations, the relationship of those binaural cues is provided in the head-related transfer function (HRTF). ...