Analysis on performance of biomimetic coupled processing system

Hou, Yanli; Su, Jia; Xia, Kewen; Xian, Ji

doi:10.1109/iccsn.2017.8230233

Cited by 2 publications

(8 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4. Frequency response of the coupling system when excited by a sound wave with an angle of incidence between 0 • and 90 showing that the coupling system here is less sensitive [33]. Moreover, at a frequency of 8000 Hz, a nearly 180 • phase rotation across the angle of incidence is most pronounced.…”

Section: Signal Definition For the Excitation Of Two Microphones With...mentioning

confidence: 86%

“…In a next step, X p,1 (ω, τ (Θ in )) and X p,2 (ω, τ (Θ in )) can be substituted into equations (9) and 10. In [33], the amplitude difference in [dB] and the phase difference in…”

Section: Frequency Response Of Coupling System For Different Angles O...mentioning

confidence: 99%

“…Hou et al [33,35] have shown an approach to determine the most sensitive angle of incidence. Considering this, it is possible to change the characteristic and especially the most sensitive angle of incidence using the coupling parameters.…”

Section: Frequency Response Of Coupling System For Different Angles O...mentioning

confidence: 99%

“…The system theoretical behaviors as well as the compatibility of miniaturization of the coupling system of Ormia were used in the optimization of antenna arrays [24][25][26][27], in the design of microphones using a built-in analog coupling system [28][29][30], in localizing underwater targets [22] and to estimate the direction-of-arrival (DOA) based on microphone arrays [23,31,32]. In [33], an approach to estimate the most sensitive frequency and the most sensitive angle of incidence of an incoming plane sound wave were considered. For the coupling parameters determined by Miles et al and Ormia's tympanal distance, this resulted in a frequency of 8341.9 Hz and an angle of incidence of 40.48 • .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Direction-of-arrival estimation for acoustic signals based on direction-dependent parameter tuning of a bioinspired binaural coupling system

2023

View full text Add to dashboard Cite

Bioinspired methods for sound source localization offer opportunities for resource reduction as well as concurrent performance improvement in contrast to conventional techniques. Usually, sound source localization requires a large number of microphones arranged in irregular geometries, and thus has high resource requirements in terms of space and data processing. Motivated by biology and using digital signal processing methods, an approach that adapts the coupled hearing system of the fly Ormia ochracea with a minimally distant two-microphone array is presented. Despite its physiology, the fly is able to overcome physical limitations in localizing low-frequency sound sources. By exploiting the filtering effect of the coupling system, the direction-of-arrival (DOA) of the sound is determined with two microphones at an intermediate distance of 0,06m. For conventional beamforming algorithms, these physical limitations would result in degraded localization performance. In this work, the bioinspired coupling system is analyzed and subsequently parameterized direction-sensitive for different directions of incidence of the sound. For the parameterization, an optimization method is presented which can be adopted for excitation with plane as well as spherical sound wave propagation. Finally, the method was assessed using simulated and measured data. For 90% of the simulated scenarios, the correct direction of incidence could be determined with an accuracy of less than 1° despite the use of a minimal distant two-microphone array. The experiments with measured data also resulted in a correct determination of the direction of incidence, which qualifies the bioinspired method for practical use in digital hardware system.

show abstract

Section: Signal Definition For the Excitation Of Two Microphones With...mentioning

confidence: 86%

“…In a next step, X p,1 (ω, τ (Θ in )) and X p,2 (ω, τ (Θ in )) can be substituted into equations (9) and 10. In [33], the amplitude difference in [dB] and the phase difference in…”

Section: Frequency Response Of Coupling System For Different Angles O...mentioning

confidence: 99%

Section: Frequency Response Of Coupling System For Different Angles O...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Direction-of-arrival estimation for acoustic signals based on direction-dependent parameter tuning of a bioinspired binaural coupling system

2023

View full text Add to dashboard Cite

show abstract

“…For the aforementioned miniaturized microphone array, the coupling network circuit was designed to have a large output phase enhancement operating at a narrow frequency range by matching the common and differential modes. The narrow operation bandwidth occurred for most mechanical [25,42] and electrical coupling networks [39,43]. This was due to the fact that, if the operation frequency deviated from the desired frequency, the output phase difference was not enhanced due to the mismatches of the common and differential modes.…”

Section: Biomimetic Miniaturized Microphone Arraymentioning

confidence: 99%

A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network

Huang¹,

Liu²

2019

Sensors

View full text Add to dashboard Cite

In this research, we proposed a miniaturized two-element sensor array inspired by Ormia Ochracea for sound direction finding applications. In contrast to the convectional approach of using mechanical coupling structures for enlarging the intensity differences, we exploited an electrical coupling network circuit composed of lumped elements to enhance the phase differences and extract the optimized output power for good signal-to-noise ratio. The separation distance between two sensors could be reduced from 0.5 wavelength to 0.1 wavelength 3.43 mm at the operation frequency of 10 kHz) for determining the angle of arrivals. The main advantages of the proposed device include low power losses, flexible designs, and wide operation bandwidths. A prototype was designed, fabricated, and experiments examined within a sound anechoic chamber. It was demonstrated that the proposed device had a phase enhancement of 110 ∘ at the incident angle of 90 ∘ and the normalized power level of −2.16 dB at both output ports. The received power levels of our device were 3 dB higher than those of the transformer-type direction-finding system. In addition, our proposed device could operate in the frequency range from 8 kHz to 12 kHz with a tunable capacitor. The research results are expected to be beneficial for the compact sonar or radar systems.

show abstract

Analysis on performance of biomimetic coupled processing system

Cited by 2 publications

References 4 publications

Direction-of-arrival estimation for acoustic signals based on direction-dependent parameter tuning of a bioinspired binaural coupling system

Direction-of-arrival estimation for acoustic signals based on direction-dependent parameter tuning of a bioinspired binaural coupling system

A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network

Contact Info

Product

Resources

About