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A brief description of current research interests |
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My current job is to research the acoustic localization of sound sources in a reverberation-limited environment, including virtual sources cancellation, multi-sources separation and tracking, source identification. The main field I am studying is to enhance robustness and accuracy of the steering map of a cross microphone array. There are some other ways also used for source tracking adaptively. Aim to use a small microphone array to track moving sources such as aircraft in the air, vehicles on the ground, and speakers in a room.
In civil applications, microphone array technique has also been commonly used in the conference-calling systems to enhance the speech signal and cancel the background noise, as well as to track the speaker. However, there are many challenges such as the reverberation of the room and the multi-sources situation, which would seriously degrade the performance of the traditional microphone array. Many methods are studied to solve the problem such as de-reverberation and blind-separation. Array signal's correlation can be used to find out their hypostatic relationships to perform noise and echo cancellations and signal enhancement. Sub-band filter is also used to solve narrowband echoes in a broadband source. |
Education and qualifications
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School/College/University |
Dates Attended |
Qualifications gained, including subject, grade and date obtained |
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Institute of Acoustics, Chinese Academy of Science
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15 Aug.2000-15 Aug.2002
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Post-doctoral research fellow, Acoustic detection & localization for multi moving source tracking
2 years |
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Nanjing University of Science & Technology
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1 Sep.1996-15 April 2000
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Ph.D , Research of aero-acoustic array for vehicle noise tracking and identification,4 years,
15 June 2000 |
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East China Engineering Institute of Technology
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1 Sep.1987-30 Dec.1989
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M.E., Frequency Modulated Detection of Overhead Source.
2.5 years, 15 Jan.1990 |
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East China Engineering Institute of Technology
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1 Sep.1983-30 July.1987 |
B.E., Design Pseudorandom Card Modulated Radio Detector
4 years, 1 July.1987 |
Memberships
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Details of relevant membership of professional bodies |
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Name of professional body |
Date of membership |
Status |
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Acoustical Society of China
Chinese Society of Navigation |
Since 1 Aug.2000-now
Mar.1990-June 2003 |
Member
Expire |
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Work history |
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Details of previous work history (including voluntary or unpaid work) beginning with the most recent post |
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Dates (from/to) |
Name and address of employer |
Position held |
Summary of main duties |
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1/11/04-now
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Institute of Acoustics, Chinese Academy of Sciences |
Associate Professor
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Acoustic array, noise monitoring in industrial plant, Acoustic stealth of aircraft, Acoustic detection & measurement. |
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1/4/04-30/10/04
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Department of Engineering University of Warwick Coventry , UK |
Academic Visitor
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Research of acoustical localization of multi sound sources in a reverberation-limited environment. |
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15/8/02-1/04/04
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Institute of Acoustics, Chinese Academy of Sciences
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Associate Professor
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Aeroacoustic detection, localization & identification with a small spatial array, study of source's properties acoustic propagation near ground, adaptive inverse filter for vehicle's pass-by noise map by a cross array.
To supervise 4 post-graduates. |
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15/8/00-15/8/02
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Institute of Acoustics, Chinese Academy of Sciences
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Post-doctoral research fellow
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Research of small acoustic array for tracking fast moving vehicles and person's voice.
Speech classification and active noise control, blind source separation. |
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1/9/96-15/6/00
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Nanjing University of Science & Technology
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Associate Professor
Ph.D students
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Research of aero-acoustic array for vehicle noise detection, tracking and identification.
Supervising 7 post-graduate students, teaching 4 college projects. |
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1/1/90-30/8/96 |
Nanjing University of Science & Technology
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Lecture |
Study of physical detection with electromagnetic, radio, supersonic, capacitance, milimeter wave.
Teaching 7 college projects. |
Work Experience & Research Projects
1. From 1 September,2004: Associate Professor, IACAS, China
Subjects: Acoustic array for voice tracking & blind separation; multi sources localization in reverberant closed volume. Study of aircraft noise analysis and reduction
2. From 1 April,2004 to 30 Sep.,2004: Academic Visitor, Engineering Department, University of Warwick, UK.
Main content:
Aero-acoustic localization in a reverberation room
3. From 15 Aug.2002 to 30 Mar. 2004: Associate Professor, IACAS, China
Subjects: Acoustic array for voice tracking & blind separation; Audio-beam complement by ultrasound property array and PVDF module.
Main Achievements:
a. Create a new accurate time-delay estimation (FICP) for low-frequency wideband source localization.
b. Theoretical localization model of a small cross microphone array.
c. Audio-beam used a properties ultrasonic transducer array to produce a long beam of sound with a level over 75dB in 200m away like a spotlight, sound will be transmitted a long way with a little distortion and reduction.
d. Audio-beam performed by a large piece of PVDF module to reproduce beam of audio with a considerable level.
e. Adaptive audio beam-forming by a controlling loudspeaker plane matrix, which is a kind of intelligent sound beam producer.
4. From 15 Aug.2000 to 15 Aug.2002: Post-doctoral Research Fellow, IACAS, China
Subjects: Acoustic imagination by linear microphone & cross array for vehicle noise detection; Active noise control & adaptive echo cancellation.
Main Achievements:
a. Accurate weak signal detection system design.
b. Accurate localization model of some simple triangle array and square array.
c. Administration of more than 5 wild tests for moving acoustic source detection.
d. Echo cancellation & virtual source elimination in a small room for sources localization.
e. Blind separation for multi-sources tracking.
f. LMS and NLMS used in active noise control, frequency selection for improvement of single tone cancellation.
5. From 1 Sep.1996 to 15 June,2000: Ph.D, Associate Professor, Mechanical & Electrocs Department, NUST.
Subjects: Aero-acoustic tracking for vehicle noise; Semiconductor Laser device used for short range detection; Analysis of reliability of a detecting system.
Main Achievement:
a. Property analysis of several kinds of vehicle's noise.
b. Study of acoustic propagation near ground.
c. Creation of relationship between reliability and product's function.
d. Study of influence of fog for laser detection.
6. From 1 Jan.1990 to 10 Aug.1996: Assistant and Lecture after 1 Mar.1992, Mechanical & Electrocs Department, NUST.
Subjects: mechanical & electronics engineering design; infra-red used for vehicle detection; millimeter wave used to detect targets overhead.
Main Achievement:
a. Ultra sonic distance measurement.
b. Infra-red control system design.
c. Close detection by radio for moving vehicle.
7. From 1 Sep. 1987 to 30 Dec. 1989: post-graduate student, MS awarded, Communication & Electronic System Department, NUST.
Subjects: radio detection for moving vehicles; static charge detection for plane's wing in a wind tunnel; capacitance detection for micro-displacement detection.
Main Achievement:
a. A low frequency modulated way to en-long detection distance of a capacitance detector.
b. Micro-displacement measurement by capacitance detection.
c. Determination of situation of wing of plane by detecting static charge.
d. Study of a pseudorandom phase detection for a singlechip system. | 
