Experimental study of robust acoustic beamforming for speech acquisition in reverberant and noisy environments

Zhao, Yingke; Jensen, Jesper; Jensen, Tobias Lindstrøm; Chen, Jingdong; Christensen, Mads Græsbøll

doi:10.1016/j.apacoust.2020.107531

Cited by 11 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8(a) shows a schematic (top view) of an . The weighted addition or subtraction of the acquired signals from sensors 1 and 2 enables beamforming with a bipolar directivity toward a specific direction, as described by (5). The directivities of sensors 1 and 2 are y 1 and y 2 , respectively.…”

Section: Spatial Filtering Using Proposed Sensormentioning

confidence: 99%

“…In addition, a hearing aid should suppress ambient noise and provide relevant sounds to the user [2], [3]. Acoustic beamforming is a spatial filtering method used to obtain desired sound signals in a noisy environment [4], [5]. Beamforming using an omnidirectional microphone array relies on the instants at which sound reaches the microphones [6], [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Directional Sound Sensor With Consistent Directivity and Sensitivity in the Audible Range

Kang

Hong

Rhee

et al. 2021

J. Microelectromech. Syst.

View full text Add to dashboard Cite

Inspired by the human cochlea, we propose a directional sound sensor using a resonator array to overcome the limitations of existing directional microphones. The proposed sensor consists of multiple cantilevers that respond to different resonance frequencies and separately acquire signals to then combine them for sound sensing. The directionality of the cantilevers is bipolar (figure -of-8) because a signal proportional to the input sound's pressure gradient is generated. We adopt multimode resonance to cover the wide frequency range of 100-8,000 Hz using few resonators. A wide-bandwidth (low-quality-factor) trenched cantilever is used to obtain a flat frequency response. Bidirectional sound sensors are tapered to achieve acoustic beamforming by simple signal processing. The directional characteristics can be easily changed according to the weighted sum of the signals acquired from a pair of sensors. We demonstrate that ambient noise can be effectively suppressed through beamforming to acquire the desired signal using the proposed sensor.

show abstract

Section: Spatial Filtering Using Proposed Sensormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Directional Sound Sensor With Consistent Directivity and Sensitivity in the Audible Range

Kang

Hong

Rhee

et al. 2021

J. Microelectromech. Syst.

View full text Add to dashboard Cite

show abstract

“…Beamforming is to obtain the direction of the sound source by summing weighted array signals, and is classified into frequency domain beamforming and time domain beamforming [ 13 , 14 ]. In frequency domain beamforming, many methods have been proposed to improve its performance [ 15 , 16 ]. Reference [ 15 ] improved the robustness by adding norm constraints and spatial smoothing techniques.…”

Section: Introductionmentioning

confidence: 99%

“…In frequency domain beamforming, many methods have been proposed to improve its performance [ 15 , 16 ]. Reference [ 15 ] improved the robustness by adding norm constraints and spatial smoothing techniques. Reference [ 16 ] proposed nested arrays to improve beamforming performance.…”

Section: Introductionmentioning

confidence: 99%

Sound Source Localization Based on Multi-Channel Cross-Correlation Weighted Beamforming

Liu

Zeng

et al. 2022

Micromachines

View full text Add to dashboard Cite

Beamforming and its applications in steered-response power (SRP) technology, such as steered-response power delay and sum (SRP-DAS) and steered-response power phase transform (SRP-PHAT), are widely used in sound source localization. However, their resolution and accuracy still need improvement. A novel beamforming method combining SRP and multi-channel cross-correlation coefficient (MCCC), SRP-MCCC, is proposed in this paper to improve the accuracy of direction of arrival (DOA). Directional weight (DW) is obtained by calculating the MCCC. Based on DW, suppressed the non-incoming wave direction and gained the incoming wave direction to improve the beamforming capabilities. Then, sound source localizations based on the dual linear array under different conditions were simulated. Compared with SRP-PHAT, SRP-MCCC has the advantages of high positioning accuracy, strong spatial directivity and robustness under the different signal–noise ratios (SNRs). When the SNR is −10 dB, the average positioning error of the single-frequency sound source at different coordinates decreases by 5.69%, and that of the mixed frequency sound sources at the same coordinate decreases by 5.77%. Finally, the experimental verification was carried out. The results show that the average error of SRP-MCCC has been reduced by 8.14% and the positioning accuracy has been significantly improved, which is consistent with the simulation results. This research provides a new idea for further engineering applications of sound source localization based on beamforming.

show abstract

“…e teaching program is generally adapted to the fixed tasks it corresponds to, and its reusability is poor. erefore, a new control strategy is needed to improve the accuracy, speed, flexibility, smoothness of motion, system stability, etc., of the robotic arm, so as to improve the efficiency of the robotic arm [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Research on Door-Opening Strategy Design of Mobile Manipulators Based on Visual Information and Azimuth

Chen

Liu

2022

Scientific Programming

View full text Add to dashboard Cite

At present, the manipulator has become an important auxiliary tool in the production and processing operations, so new requirements are put forward for the control strategy of the manipulator. In production, because traditional manipulators can only perform tasks according to the set procedures and cannot fully realize the intelligence and collaboration of control, how to improve the operating efficiency of manipulators has become an urgent problem to be solved. The autonomous door-opening control of robots is a challenging research topic in the field of automation. In the robot movement, target recognition and positioning and the coordinated control of manipulators and mobile platforms are difficult points in the research of autonomous door-opening control. Through the research on autonomous door-opening control, the robot has a broader working space, which greatly improves the robot’s ability to serve humans and has important theoretical value and practical significance.

show abstract

Experimental study of robust acoustic beamforming for speech acquisition in reverberant and noisy environments

Cited by 11 publications

References 34 publications

Directional Sound Sensor With Consistent Directivity and Sensitivity in the Audible Range

Directional Sound Sensor With Consistent Directivity and Sensitivity in the Audible Range

Sound Source Localization Based on Multi-Channel Cross-Correlation Weighted Beamforming

Research on Door-Opening Strategy Design of Mobile Manipulators Based on Visual Information and Azimuth

Contact Info

Product

Resources

About