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Central Auditory Processing: From Diagnosis to Rehabilitation
Published in Stavros Hatzopoulos, Andrea Ciorba, Mark Krumm, Advances in Audiology and Hearing Science, 2020
Maria Isabel Ramos do Amaral, Leticia Reis Borges, Maria Francisca Colella-Santos
There are several tests developed to assess binaural interaction, including masking level difference (MLD) (Hirsh, 1948, Wilson et al., 1994), Binaural Fusion test (Willesford test battery, 1977; Pereira and Schochat, 2015, Brazilian version) and, most recently, listening and spatialized noise–sentences test—LISN-S, related to special processing (Cameron and Dillon, 2007a, 2007b, 2008).
Binaural and spatial hearing
Published in Stanley A. Gelfand, Hearing, 2017
The binaural fusion mechanism has been described in terms of a model by Cherry and Sayers (Cherry and Sayers, 1956; Sayers and Cherry, 1957) in which the central auditory nervous system carries out a running cross-correlation between the inputs to the two ears. In other words, the signals entering the ears are viewed as statistical events, and the fusion mechanism operates by looking for commonalities between the inputs coming from the two ears on an ongoing basis.
ENTRIES A–Z
Published in Philip Winn, Dictionary of Biological Psychology, 2003
Relating to both ears, as opposed to only one (MONAURAL). The term DICHOTIC is also used (see DICHOTIC LISTENING TASK) but in this case different material is presented to each ear, whereas binaural is a word describing normal listening to material using both ears. BINAURAL beat is a periodic elevation of LOUDNESS accompanying simultaneous presentation of different low frequency tones, one to each ear—it occurs when the peaks of the tones are in synchrony. Similarly, BINAURAL shift is the periodic change in SOUND LOCALIZATION that occurs when two low-frequency sounds are presented—this occurs because of variation in the phase of each sound. BINAURAL fusion is the perception of independent sounds as one single sound (also called AUDITORY FUSION). BINAURAL ratio is the ratio of sound intensity presented to each ear, and BINAURAL summa tion is the increase in loudness when a sound is heard through both ears rather than just one.
Pupillometry as a measure for listening effort in children: a review
Published in Hearing, Balance and Communication, 2020
N. Gómez-Merino, F. Gheller, G. Spicciarelli, P. Trevisi
Steel et al. [37] investigated listening effort in a group of 25 children with deafness (24 of them fitted bilaterally with cochlear implants) and 24 age-matched typically-hearing peers (age range 5–17). The aim of the study was to examine the effect of ‘binaural fusion’ when using bilateral cochlear implants and to investigate the relationship between low binaural fusion and listening effort. Stimuli consisted of acoustic click-trains and participants were asked to indicate whether they heard one solid sound or two separated sounds, by clicking their response in the laptop as fast as possible. Response times and pupil diameters were recorded in order to reflect the listening effort during the task. Hearing-impaired children showed longer reaction times than those of normal-hearing children. Furthermore, the pupil diameter was larger when the perception of binaural fusion was lower.
Dichotic listening training following neurological injury in adults: a pilot study
Published in Hearing, Balance and Communication, 2020
Mary Purdy, Jennifer McCullagh
Dichotic listening and auditory comprehension testing were completed pre-and post- dichotic listening training. The dichotic listening assessments were conducted during a two-hour long session in a double-walled sound treated room with the second author. The CAP evaluation included dichotic listening tests of binaural integration (Dichotic Digits) [13], binaural fusion (Dichotic Rhyme) [19], and binaural separation (Competing Sentences) [20]. All speech and CAP test stimuli were pre-recorded on compact disc (CD), played on a Sony CDP-CE500 compact disc player and routed through a GSI 61 diagnostic audiometer to ER-3A insert earphones. All stimuli were presented at 50 dB SL re: speech reception threshold. All tests were administered according to standard procedure and percent correct was calculated for each ear for each test. Deficits in binaural integration were defined as performance of less than 90% accuracy in at least one ear on the Dichotic Digits test for participants with normal peripheral hearing sensitivity, or less than 80% accuracy in at least one ear for participants with cochlear hearing loss when the test stimuli were presented at equal sensation levels to each ear [13]. Deficits in binaural fusion were defined as performance of less than 30% in one ear on the Dichotic Rhyme test administered at equal sensation levels to each ear [19]. Deficits in binaural separation were defined as performance of less than 90% accuracy on the Competing Sentences test administered with test stimuli in the target ear presented 15 dB SL below the stimuli presented to the non-target ear [20].
Spatial speech-in-noise performance in simulated single-sided deaf and bimodal cochlear implant users in comparison with real patients
Published in International Journal of Audiology, 2023
Tim Jürgens, Thomas Wesarg, Dirk Oetting, Lorenz Jung, Ben Williges
Furthermore, there may be differences in binaural fusion abilities between NH listeners using bimodal simulations and actual bimodal CI users (Reiss et al. 2014). While NH listeners are experienced with binaural fusion in everyday life, they were not extensively trained to binaurally integrate the degraded CI simulation and HA simulation inputs. Likewise, actual bimodal CI users may have had more binaural fusion experience in everyday life preceding the experiment, but their overall ability for binaural fusion may be limited. This may explain some of the variability in the CI users’ performance that was not observed in the simulations.