title: A directionally tunable but frequency-invariant beamformer on an acoustic velocity-sensor triad to enhance speech perception.
abstract: Herein investigated are computationally simple microphone-array beamformers that are independent of the frequency-spectra of all signals, all interference, and all noises. These beamformers allow the listener to tune the desired azimuth-elevation "look direction." No prior information is needed of the interference. These beamformers deploy a physically compact triad of three collocated but orthogonally oriented velocity sensors. These proposed schemes' efficacy is verified by a jury test, using simulated data constructed with Mandarin Chinese (a.k.a. Putonghua) speech samples. For example, a desired speech signal, originally at a very adverse signal-to-interference-and-noise power ratio (SINR) of -30 dB, may be processed to become fully intelligible to the jury.
authors.affiliation: Centre for Signal Processing, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore, Singapore.
authors.forename: Yue Ivan
authors.initials: YI
authors.lastname: Wu
authors.forename: Kainam Thomas
authors.initials: KT
authors.lastname: Wong
authors.forename: Xin
authors.initials: X
authors.lastname: Yuan
authors.forename: Siu-Kit
authors.initials: SK
authors.lastname: Lau
authors.forename: Shiu-Keung
authors.initials: SK
authors.lastname: Tang
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D000465:Algorithms; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D009622:Noise; D010470:Perceptual Masking / Q000502:physiology; D013061:Speech Acoustics; D013065:Speech Intelligibility / Q000502:physiology; D013067:Speech Perception / Q000502:physiology*