TY - GEN
T1 - Suppression of two noise sources in the same direction by instantaneous spectral subtraction
AU - Ozawa, Kenji
AU - Watanabe, Kanji
AU - Sakamoto, Shuichi
N1 - Funding Information:
Work supported by JSPS KAKENHI (JP19K04408).
Publisher Copyright:
© 2019 IEEE.
PY - 2019/10
Y1 - 2019/10
N2 - This study extends our noise suppression method using a microphone array to a case where a target and two noise sources are in the same direction. Four microphones are arranged to focus the target sound and their outputs are converted into a spatio-temporal sound pressure distribution image. The two-dimensional fast Fourier transform (2D FFT) spectral components of the target are localized as direct current (DC) components along the spatial axis. Meanwhile, the 2D-FFT components of noise signals are spread into the target spectrum. Based on the spread spectrum, the DC components of the noises are estimated in every temporal frame and subtracted from the target spectrum. Computational experiment indicates that the noise is suppressed by approximately 20 dB when the two noise sources are located farther than the target source.
AB - This study extends our noise suppression method using a microphone array to a case where a target and two noise sources are in the same direction. Four microphones are arranged to focus the target sound and their outputs are converted into a spatio-temporal sound pressure distribution image. The two-dimensional fast Fourier transform (2D FFT) spectral components of the target are localized as direct current (DC) components along the spatial axis. Meanwhile, the 2D-FFT components of noise signals are spread into the target spectrum. Based on the spread spectrum, the DC components of the noises are estimated in every temporal frame and subtracted from the target spectrum. Computational experiment indicates that the noise is suppressed by approximately 20 dB when the two noise sources are located farther than the target source.
KW - Spatio-temporal sound pressure distribution image
KW - Spectral subtraction
KW - Spherical wave
KW - Two-dimensional FFT
UR - http://www.scopus.com/inward/record.url?scp=85081954732&partnerID=8YFLogxK
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U2 - 10.1109/GCCE46687.2019.9015244
DO - 10.1109/GCCE46687.2019.9015244
M3 - Conference contribution
AN - SCOPUS:85081954732
T3 - 2019 IEEE 8th Global Conference on Consumer Electronics, GCCE 2019
SP - 745
EP - 746
BT - 2019 IEEE 8th Global Conference on Consumer Electronics, GCCE 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 8th IEEE Global Conference on Consumer Electronics, GCCE 2019
Y2 - 15 October 2019 through 18 October 2019
ER -