Article
Biochemistry & Molecular Biology
Liberty S. Hamilton, Yulia Oganian, Jeffery Hall, Edward F. Chang
Summary: This study demonstrates that cortical processing in the human auditory cortex is not serially hierarchical, but instead exhibits parallel and independent information processing. The primary and nonprimary auditory cortices have distinct roles in speech perception, with the nonprimary cortex playing an essential independent role.
Article
Biochemistry & Molecular Biology
Rebecca E. Poulsen, Leandro A. Scholz, Lena Constantin, Itia Favre-Bulle, Gilles C. Vanwalleghem, Ethan K. Scott
Summary: Most animals have complex auditory systems to identify salient features of the acoustic landscape and respond appropriately. Despite having simpler brains, larval fish rely heavily on sophisticated sensory processing for survival.
Article
Chemistry, Analytical
Nannan Zong, Meihong Wu
Summary: The study demonstrates that humans have the ability to process extremely rapid changes in interaural configurations and store acoustic features in a transient auditory manner. Interaural delay affects the ability to store acoustic features temporarily, and the relationship between wideband and narrowband simulation noise in auditory processes is explored.
Article
Acoustics
Sean R. Anderson, Alan Kan, Ruth Y. Litovsky
Summary: Patients with bilateral cochlear implants may experience difficulties in distinguishing targets of interest and background noise due to patient-specific differences in the interface between cochlear implant electrodes and the auditory nerve. This study investigates the impact of comparing degraded temporal envelope information across spectral channels on the ability to detect differences in amplitude modulation rate. Results suggest that electrodes with poorer temporal fidelity act as a bottleneck in comparisons of temporal information, limiting access to cues used for segregating sounds.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Neurosciences
John C. Middlebrooks
Summary: This story is about the search for a cortical map of auditory space, which has not been found after 40 years of research. Instead, researchers have discovered the dynamic spatial properties of cortical neurons.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Cell Biology
Joonyeup Lee, Gideon Rothschild
Summary: The study revealed that in the auditory cortex of behaving mice, Off-responses encode preceding sound sequences and learning to associate a sound sequence with a reward enhances Off-responses. Learning also improves the network-level discriminability of sound sequences by Off-responses.
Article
Biology
Tom P. Franken, Brian J. Bondy, David B. Haimes, Joshua H. Goldwyn, Nace L. Golding, Philip H. Smith, Philip X. Joris
Summary: The study found that Lateral Superior Olive (LSO) neurons exhibit exquisite sensitivity to interaural time differences (ITDs) and can accurately process transient sound information. Inhibition in LSO neurons can block excitation over an extremely short window, achieved through inhibitory synapses on the axon initial segment.
Article
Behavioral Sciences
Eileanor P. LaRocco, Glenn A. Proudfoot, Megan D. Gall
Summary: Northern saw-whet owls primarily use sound for hunting in darkness and are sensitive to low-frequency sounds from various directions and high-frequency sounds from ground-dwelling prey items. They exhibit greater directional sensitivity at higher frequencies, with the most sensitivity towards sounds originating in front of and above their heads.
BRAIN BEHAVIOR AND EVOLUTION
(2022)
Article
Acoustics
Nicholas R. Haywood, Jaime A. Undurraga, David McAlpine
Summary: This research found that for abruptly gated sounds, interaural time difference (ITD) cues at onset are more important than those following, and the envelope shape of the sound strongly influences the perceptual outcomes of ITD cues. Different envelope shapes can affect the perception of ITD cues, with abrupt envelopes at onset and offset having greater influence on perception.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Review
Audiology & Speech-Language Pathology
Yunfang Zheng, Jacob Swanson, Janet Koehnke, Jianwei Guan
Summary: Localization ability is crucial for communication, learning, and safety. However, confounding effects in common listening environments and hearing loss can negatively affect localization accuracy. Different hearing devices also pose unique challenges for sound localization, but advancements in technology are helping users achieve better hearing and sound localization in real-life environments.
AMERICAN JOURNAL OF AUDIOLOGY
(2022)
Article
Biochemical Research Methods
Go Ashida, Daniel J. Tollin, Jutta Kretzberg
Summary: Sound localization heavily relies on precise timing and intensity differences in sound inputs to both ears. While aging leads to a loss of inhibitory synaptic transmission in the auditory system, activity-dependent plasticity may help neurons maintain their binaural tuning function. Computational modeling suggests that compensatory mechanisms, such as adjusting the strength of remaining inhibitory inputs, can mitigate the negative effects of inhibition loss on sound localization.
PLOS COMPUTATIONAL BIOLOGY
(2021)
Article
Neurosciences
Raul Luna, Ignacio Serrano-Pedraza, Karl R. Gegenfurtner, Alexander C. Schuetz, David Souto
Summary: During smooth pursuit eye movements, repeatedly exposing observers to background motion with a fixed direction relative to the pursued target can lead to a shift in their point of subjective stationarity (PSS), reflecting a recalibration of the reference signal in response to prevailing retinal motion during pursuit. This recalibration effect is specific to the exposed visual hemifield.
Article
Acoustics
Philip X. Joris
Summary: Counts of spike coincidences can be used to compare responses to different stimuli or different neurons, especially in terms of temporal factors. However, these methods do not provide an absolute measurement of latency, i.e., the time interval between stimulus features and response. Thus, it is desirable to have such a measure within the analysis framework of coincidence counting.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Proceedings Paper
Engineering, Biomedical
Ben-Zheng Li, Sio Hang Pun, Mang Vai, Achim Klug, Tim C. Lei
Summary: This passage discusses how the mammalian sound localization pathway utilizes the microsecond-level difference in sound arrival times at the two ears to localize sound sources, while also exploring the integration of signals by neural circuits in the auditory brainstem and the underlying mechanisms. Studies have found that variations in axon myelination in the auditory brainstem impact the precision of sound localization.
2021 43RD ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE & BIOLOGY SOCIETY (EMBC)
(2021)
Article
Neurosciences
Michael C. C. Slama, Bertrand Delgutte
JOURNAL OF NEUROSCIENCE
(2015)
Article
Neurosciences
Mitchell L. Day, Bertrand Delgutte
JOURNAL OF NEUROPHYSIOLOGY
(2016)
Article
Neurosciences
Yoojin Chung, Kenneth E. Hancock, Bertrand Delgutte
JOURNAL OF NEUROSCIENCE
(2016)
Article
Neurosciences
Kenneth E. Hancock, Yoojin Chung, Martin F. McKinney, Bertrand Delgutte
JARO-JOURNAL OF THE ASSOCIATION FOR RESEARCH IN OTOLARYNGOLOGY
(2017)
Article
Neurosciences
Nathaniel Zuk, Bertrand Delgutte
JOURNAL OF NEUROPHYSIOLOGY
(2017)
Article
Neurosciences
Sridhar Srinivasan, Bernhard Laback, Piotr Majdak, Bertrand Delgutte
JARO-JOURNAL OF THE ASSOCIATION FOR RESEARCH IN OTOLARYNGOLOGY
(2018)
Article
Neurosciences
Yoojin Chung, Bertrand Delgutte, H. Steven Colburn
JARO-JOURNAL OF THE ASSOCIATION FOR RESEARCH IN OTOLARYNGOLOGY
(2015)
Article
Neurosciences
Brian D. Buechel, Kenneth E. Hancock, Yoojin Chung, Bertrand Delgutte
JARO-JOURNAL OF THE ASSOCIATION FOR RESEARCH IN OTOLARYNGOLOGY
(2018)
Article
Neurosciences
Yaqing Su, Bertrand Delgutte
JOURNAL OF NEUROPHYSIOLOGY
(2019)
Article
Neurosciences
Yaqing Su, Bertrand Delgutte
JOURNAL OF NEUROSCIENCE
(2020)
Article
Neurosciences
Woongsang Sunwoo, Bertrand Delgutte, Yoojin Chung
Summary: The study found that chronic bilateral CI stimulation during development can partially reverse the impact of early-onset deafness on ITD sensitivity, restoring the level of neural sensitivity in rabbits. However, the stimulation did not improve temporal coding in early-deaf rabbits.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Neurosciences
Yaqing Su, Yoojin Chung, Dan F. M. Goodman, Kenneth E. Hancock, Bertrand Delgutte
Summary: The study revealed neural mechanisms differences in pitch perception of irregular sounds between rabbits with normal hearing and those with cochlear implants. IC neurons showed tuning of firing rate to average pulse rate and differences in synchronized responses to periodic and irregular pulse trains in both groups of rabbits.
JARO-JOURNAL OF THE ASSOCIATION FOR RESEARCH IN OTOLARYNGOLOGY
(2021)
Article
Neurosciences
Joseph D. Wagner, Alice Gelman, Kenneth E. Hancock, Yoojin Chung, Bertrand Delgutte
Summary: This study investigates rabbits' ability to discriminate complex tones without fundamental frequency (F0) and shows that rabbits can use either spectral or temporal cues to perceive pitch. The findings suggest that the role of spectral cues in pitch perception by animals may have been underestimated in previous studies focusing on low frequencies.
JOURNAL OF NEUROPHYSIOLOGY
(2022)
Article
Neurosciences
Kenneth E. Hancock, Bertrand Delgutte
Summary: Dichotic pitches, such as the Huggins pitch and the binaural edge pitch, are perceptual illusions created by binaural interactions. In this study, scientists investigated the neural responses of binaural neurons in the auditory midbrain and found that these neurons encode the frequency of dichotic pitches through specific features in their firing rates. These findings provide physiological evidence for the neural mechanisms underlying dichotic pitches.
JOURNAL OF NEUROPHYSIOLOGY
(2023)
Article
Neurosciences
Oded Barzelay, Stephen David, Bertrand Delgutte
Summary: Reverberation, which is commonly observed in everyday acoustic environments, can degrade binaural cues and envelope modulations and affect speech perception. However, both humans and animals can accurately perceive reverberant stimuli in most daily situations. In this study, neural responses to reverberant and non-reverberant speech stimuli were recorded in the inferior colliculus of rabbits, and it was found that high-quality spectrogram reconstruction can be obtained in moderate reverberation but deteriorates in severe reverberation.