Investigation on Optimal Microphone Arrangement of Spherical Microphone Array to Achieve Shape Beamforming

Taguchi, Tomoki; Nakadai, Takahiro; Egusa, Ryohei; Namatame, Miki; Kusunoki, Fusako; Sugimoto, Masanori; Yamaguchi, Etsuji; Inagaki, Shigenori; Takeda, Yuji; Mizoguchi, Hiroshi

doi:10.1109/isms.2014.62

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Moreover, the grouping of microphones in subarrays enables a variable N am and frequency response [9,10]. This is a topic that has been largely explored ( [24,25] or [26]) and is out of the scope of this work. The microphone array used to evaluate the proposed reconfigurable architectures presents the following characteristics to achieve the desired dynamism:…”

Section: Description Of the Stagesmentioning

confidence: 99%

Design Exploration and Performance Strategies towards Power-Efficient FPGA-Based Architectures for Sound Source Localization

et al. 2019

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Many applications rely on MEMS microphone arrays for locating sound sources prior to their execution. Those applications not only are executed under real-time constraints but also are often embedded on low-power devices. These environments become challenging when increasing the number of microphones or requiring dynamic responses. Field-Programmable Gate Arrays (FPGAs) are usually chosen due to their flexibility and computational power. This work intends to guide the design of reconfigurable acoustic beamforming architectures, which are not only able to accurately determine the sound Direction-Of-Arrival (DoA) but also capable to satisfy the most demanding applications in terms of power efficiency. Design considerations of the required operations performing the sound location are discussed and analysed in order to facilitate the elaboration of reconfigurable acoustic beamforming architectures. Performance strategies are proposed and evaluated based on the characteristics of the presented architecture. This power-efficient architecture is compared to a different architecture prioritizing performance in order to reveal the unavoidable design trade-offs.

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Section: Description Of the Stagesmentioning

confidence: 99%

Design Exploration and Performance Strategies towards Power-Efficient FPGA-Based Architectures for Sound Source Localization

et al. 2019

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“…We designed the optimal spherical microphone array depicted in Fig. 4 using this kind of simulation [6].…”

Section: B Realization Of Three-dimensional Directivitymentioning

confidence: 99%

Novel Application of Spherical Microphone Array Sensor with Three-Dimensional Directivity

Nakadai

Taguchi

Mizoguchi

et al. 2014

International Journal on Smart Sensing and Intelligent Systems

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Mixed sounds can be separated from multiple sound sources by utilizing a microphone array and signal processing. We believe that promotion of interest in this technique can lead to significant developments in future science and technology. Consequently, in order to experience this technique, we designed a language game for children called "KIKIWAKE 3D" that uses a sound source separation system with the aim of arousing children's interest in this technology. In this paper, we discuss the development of a spherical microphone array with threedimensional directivity introduced to make the game more interesting and to facilitate a larger number of participants.

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“…However, a listener cannot clearly recognize any sound because the processing relatively accentuates the sound. To eliminate the non-objective sound, we implemented frequency-band selection (FBS) [10] after the microphone array signal processing. The frequency components of a human voice have individual differences; thus, this method was utilized.…”

Section: Introductionmentioning

confidence: 99%

Sound-Separation System using Spherical Microphone Array with Three-Dimensional Directivity—KIKIWAKE 3D: Language Game for Children

Nakadai

Nakayama

Taguchi

et al. 2014

International Journal on Smart Sensing and Intelligent Systems

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Mixed sounds can be separated from multiple sound sources using microphone array sensor and signal processing. We believe that promotion of interest in this technique can lead to significant future development in science and technology. To investigate this technique, we designed a language game for children called “KIKIWAKE 3D” that uses a sound-source-separation system to arouse children’s interest in this technology. However, the microphone array sensor in a previous research had a limited scope in separating sounds. We developed a spherical microphone array sensor with three-dimensional directivity designed for this game. In this paper, we report the evaluation of this microphone array sensor in adapting to this game by separating the sound level and using questionnaires.

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Investigation on Optimal Microphone Arrangement of Spherical Microphone Array to Achieve Shape Beamforming

Cited by 3 publications

References 5 publications

Design Exploration and Performance Strategies towards Power-Efficient FPGA-Based Architectures for Sound Source Localization

Design Exploration and Performance Strategies towards Power-Efficient FPGA-Based Architectures for Sound Source Localization

Novel Application of Spherical Microphone Array Sensor with Three-Dimensional Directivity

Sound-Separation System using Spherical Microphone Array with Three-Dimensional Directivity—KIKIWAKE 3D: Language Game for Children

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