Localisation of Vertical Auditory Phantom Image with Band-limited Reductions of Vertical Interchannel Crosstalk

Direct sound that is captured by the upper layer of a three-dimensional (3D) microphone array is typically regarded as vertical interchannel crosstalk (VIC), since it tends to produce an undesired effect of the sound source image being elevated from the ear-level loudspeaker layer position (0°) in reproduction. The present study examined the effectiveness of band-limited VIC attenuation methods on preventing the vertical image shift problem. In a subjective experiment, five natural sound sources were presented as vertically-oriented phantom images while using two stereophonic loudspeaker pairs elevated at 0° and 30° in front of the listener. The upper layer signal (i.e., VIC) was attenuated in various octave-band-dependent conditions that were based on vertical localisation thresholds obtained from previous studies. The results showed that it was possible to achieve the goal of panning the phantom image at the same height as the image produced by the main loudspeaker layer by attenuating only a single octave band with the centre frequency of 4 kHz or 8 kHz or multiple bands at 1 kHz and above. This has a useful practical implication in 3D sound recording and mixing where a vertically oriented phantom image is rendered.

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Improvement of Range Estimation with Microphone Array

Cybernetics and Information Technologies ◽

10.1515/cait-2017-0009 ◽

2017 ◽

Vol 17 (1) ◽

pp. 113-125 ◽

Cited By ~ 1

Author(s):

Volodymyr Kudriashov

Keyword(s):

Acoustic Noise ◽

Microphone Array ◽

Three Dimensional ◽

Simultaneous Estimation ◽

Destructive Testing ◽

Sound Sources ◽

Range Resolution ◽

Incoming Signal ◽

Emitter Localization ◽

Non Destructive

Abstract This paper presentsanew approach for the three-dimensional (3-D) localization of sound sources. An acoustic camera uses an angular beamforming to measure the Direction of Arrival (Do A) of an incoming signal, to localize the emission source. The acoustic sensor used in this article is the Brüel & Kjaer acoustic camera transformed to operate inabistatic mode. The transformation consists inaplacing of one of the microphones of the acoustic camera outside of its microphone array. This allows simultaneous estimation of the Do Aand the Time Difference of Arrival (TDo A) of the incoming signal(s). Such sensors were not found. The paper proposes emitter localization in range - cross range - elevation coordinates by combining estimates of TDo Aand Do Aand presents the signal processing method for that purpose. The range resolution of 0.2mwas achieved in an experiment. Experimental results were obtained using different emission sources. Adescription of resolution cell limitations is presented. The obtained results show acoustic noise source localization without the pre-metering of the range of the imaging plane, i.e., withoutaneed to use the additional range meter which is notapart of the acoustic camera. The latter is important in tasks of non-destructive testing.

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Bio-Inspired Microscale Three Dimensional Directional Sensing Microphone Array

2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers) ◽

10.1109/transducers50396.2021.9495601 ◽

2021 ◽

Author(s):

Ashiqur Rahaman ◽

Byungki Kim

Keyword(s):

Microphone Array ◽

Three Dimensional

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Locating and tracking sound sources on a horizontal axis wind turbine using a compact microphone array based on beamforming

Applied Acoustics ◽

10.1016/j.apacoust.2018.10.006 ◽

2019 ◽

Vol 146 ◽

pp. 295-309 ◽

Cited By ~ 3

Author(s):

Cui Qing Zhang ◽

Zhi Ying Gao ◽

Yong Yan Chen ◽

Yuan Jun Dai ◽

Jian Wen Wang ◽

...

Keyword(s):

Wind Turbine ◽

Microphone Array ◽

Horizontal Axis ◽

Horizontal Axis Wind Turbine ◽

Sound Sources

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Contribution of bone-reverberated waves to sound localization of dolphins: A numerical model

Acta Acustica ◽

10.1051/aacus/2020030 ◽

2020 ◽

Vol 5 ◽

pp. 3

Author(s):

Aida Hejazi Nooghabi ◽

Quentin Grimal ◽

Anthony Herrel ◽

Michael Reinwald ◽

Lapo Boschi

Keyword(s):

Wave Propagation ◽

Numerical Model ◽

Sound Localization ◽

Three Dimensional ◽

Vertical Plane ◽

Dimensional Structure ◽

Bone Modeling ◽

Sound Sources ◽

Localization Accuracy ◽

Future Work

We implement a new algorithm to model acoustic wave propagation through and around a dolphin skull, using the k-Wave software package [1]. The equation of motion is integrated numerically in a complex three-dimensional structure via a pseudospectral scheme which, importantly, accounts for lateral heterogeneities in the mechanical properties of bone. Modeling wave propagation in the skull of dolphins contributes to our understanding of how their sound localization and echolocation mechanisms work. Dolphins are known to be highly effective at localizing sound sources; in particular, they have been shown to be equally sensitive to changes in the elevation and azimuth of the sound source, while other studied species, e.g. humans, are much more sensitive to the latter than to the former. A laboratory experiment conducted by our team on a dry skull [2] has shown that sound reverberated in bones could possibly play an important role in enhancing localization accuracy, and it has been speculated that the dolphin sound localization system could somehow rely on the analysis of this information. We employ our new numerical model to simulate the response of the same skull used by [2] to sound sources at a wide and dense set of locations on the vertical plane. This work is the first step towards the implementation of a new tool for modeling source (echo)location in dolphins; in future work, this will allow us to effectively explore a wide variety of emitted signals and anatomical features.

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