scholarly journals Using Virtual Acoustic Space to Investigate Sound Localisation

10.5772/14193 ◽  
2011 ◽  
Author(s):  
Laura Hausmann ◽  
Hermann Wagner
Keyword(s):  
Sound Localisation ◽  
Acoustic Space

scholarly journals Neurophysiology goes wild: from exploring sensory coding in sound proof rooms to natural environments

2021 ◽  
Vol 207 (3) ◽  
pp. 303-319
Author(s):  
Heiner Römer
Keyword(s):  
Sensory System ◽  
Sensory Systems ◽  
Natural Environments ◽  
Sensory Coding ◽  
Noise Levels ◽  
Sensory Physiology ◽  
Sound Localisation ◽  
Physical Environments ◽  
History Of ◽  
Adaptive Behaviours

AbstractTo perform adaptive behaviours, animals have to establish a representation of the physical “outside” world. How these representations are created by sensory systems is a central issue in sensory physiology. This review addresses the history of experimental approaches toward ideas about sensory coding, using the relatively simple auditory system of acoustic insects. I will discuss the empirical evidence in support of Barlow’s “efficient coding hypothesis”, which argues that the coding properties of neurons undergo specific adaptations that allow insects to detect biologically important acoustic stimuli. This hypothesis opposes the view that the sensory systems of receivers are biased as a result of their phylogeny, which finally determine whether a sound stimulus elicits a behavioural response. Acoustic signals are often transmitted over considerable distances in complex physical environments with high noise levels, resulting in degradation of the temporal pattern of stimuli, unpredictable attenuation, reduced signal-to-noise levels, and degradation of cues used for sound localisation. Thus, a more naturalistic view of sensory coding must be taken, since the signals as broadcast by signallers are rarely equivalent to the effective stimuli encoded by the sensory system of receivers. The consequences of the environmental conditions for sensory coding are discussed.

scholarly journals Bone-anchored hearing system, contralateral routing of signals hearing aid or cochlear implant: what is best in single-sided deafness?

2021 ◽  
Author(s):  
Till F. Jakob ◽  
Iva Speck ◽  
Ann-Kathrin Rauch ◽  
Frederike Hassepass ◽  
Manuel C. Ketterer ◽  
...  
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Hearing Aids ◽  
Long Term Results ◽  
Speech Perception In Noise ◽  
Sound Localisation ◽  
Therapy Option ◽  
Single Sided Deafness ◽  
Objective Hearing Tests

Abstract Purpose The aim of the study was to compare long-term results after 1 year in patients with single-sided deafness (SSD) who were fitted with different hearing aids. The participants tested contralateral routing of signals (CROS) hearing aids and bone-anchored hearing systems (BAHS). They were also informed about the possibility of a cochlear implant (CI) and chose one of the three devices. We also investigated which factors influenced the choice of device. Methods Prospective study with 89 SSD participants who were divided into three groups by choosing BAHS, CROS, or CI. All participants received test batteries with both objective hearing tests (speech perception in noise and sound localisation) and subjective questionnaires. Results 16 participants opted for BAHS-, 13 for CROS- and 30 for CI-treatment. The greater the subjective impairment caused by SSD, the more likely patients were to opt for surgical treatment (BAHS or CI). The best results in terms of speech perception in noise (especially when sound reaches the deaf ear and noise the hearing ear), sound localization, and subjective results were achieved with CI. Conclusion The best results regarding the therapy of SSD are achieved with a CI, followed by BAHS. This was evident both in objective tests and in the subjective questionnaires. Nevertheless, an individual decision is required in each case as to which SSD therapy option is best for the patient. Above all, the patient's subjective impairment and expectations should be included in the decision-making process.

scholarly journals Analysis of acoustic space variability in speech affected by depression

2015 ◽  
Vol 75 ◽  
pp. 27-49 ◽  
Author(s):  
Nicholas Cummins ◽  
Vidhyasaharan Sethu ◽  
Julien Epps ◽  
Sebastian Schnieder ◽  
Jarek Krajewski
Keyword(s):  
Acoustic Space

An innovative hearing-impaired assistant with sound-localisation and speech-to-text application

2022 ◽  
Vol 14 (1) ◽  
pp. 63
Author(s):  
Shriram K. Vasudevan ◽  
K.R. Tharun Karthik ◽  
B. Bala Ganesh ◽  
B.V. Damodar ◽  
R. Dharmesh
Keyword(s):  
Hearing Impaired ◽  
Sound Localisation

Benefits of voluntary vessel slowdowns to acoustic space reduction for killer whales

2021 ◽  
Vol 150 (4) ◽  
pp. A252-A252
Author(s):  
Alexander O. MacGillivray ◽  
Zizheng Li ◽  
David E. Hannay ◽  
Krista Trounce
Keyword(s):  
Killer Whales ◽  
Space Reduction ◽  
Acoustic Space

Subjective Evaluation of Three Headphone-Based Virtual Sound Source Positioning Methods Including Differential Head-Related Transfer Function

2016 ◽  
Vol 41 (3) ◽  
pp. 437-447
Author(s):  
Dominik Storek ◽  
Frantisek Rund ◽  
Petr Marsalek
Keyword(s):  
Transfer Function ◽  
Sound Source ◽  
Subjective Evaluation ◽  
Sound Localisation ◽  
Signal Features ◽  
Listening Tests ◽  
Positioning Method ◽  
Head Related Transfer Function ◽  
Positioning Algorithm ◽  
Source Positioning

Abstract This paper analyses the performance of Differential Head-Related Transfer Function (DHRTF), an alternative transfer function for headphone-based virtual sound source positioning within a horizontal plane. This experimental one-channel function is used to reduce processing and avoid timbre affection while preserving signal features important for sound localisation. The use of positioning algorithm employing the DHRTF is compared to two other common positioning methods: amplitude panning and HRTF processing. Results of theoretical comparison and quality assessment of the methods by subjective listening tests are presented. The tests focus on distinctive aspects of the positioning methods: spatial impression, timbre affection, and loudness fluctuations. The results show that the DHRTF positioning method is applicable with very promising performance; it avoids perceptible channel coloration that occurs within the HRTF method, and it delivers spatial impression more successfully than the simple amplitude panning method.

The role of NZ English in a binary feature analysis of English short vowels

1976 ◽  
Vol 6 (2) ◽  
pp. 50-66 ◽  
Author(s):  
Peter Hawkins
Keyword(s):  
Feature Analysis ◽  
Distinctive Features ◽  
Short Vowels ◽  
Binary Feature ◽  
Acoustic Space ◽  
High Vowels

The Jakobsonian system of binary distinctive features is based on the premise that, as far as vowels are concerned, their articulation, and the resulting acoustic effects, are not distributed randomly over the available articulatory or acoustic space, but are organized into systems of binary contrasts, so that for example (in articulatory terms) a set of front vowels will be matched by a corresponding set of back vowels, a set of high vowels by a set of mid or low vowels, and so on. There will thus be a certain symmetry in the distribution of such vowels, either in their positions on a vowel quadrilateral, or in a similar schematic shape such as the five-vowel triangle.

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