Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Reexamination Certificate
2008-07-15
2008-07-15
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having acoustic wave modifying structure
C381S092000, C381S091000
Reexamination Certificate
active
07400736
ABSTRACT:
A conferencing unit, comprising an array of microphones embedded in a diffracting object configured to provide a desired high frequency directivity response at predetermined microphone positions, and a low frequency beamformer operable to achieve a desired low frequency directivity response, wherein the beamformer is linearly constrained to provide a smooth transition between low and high frequency directivity responses.
REFERENCES:
patent: 5592441 (1997-01-01), Kuhn
patent: 5742693 (1998-04-01), Elko
patent: 6041127 (2000-03-01), Elko
patent: 6681023 (2004-01-01), Turnbull et al.
patent: 7068801 (2006-06-01), Stinson et al.
patent: 7269263 (2007-09-01), Dedieu et al.
patent: 2292357 (2000-08-01), None
Jens Meyer, “Beamforming for a Circular Microphone Array Mounted on Spherically Shaped Objects”, Journal of the Acoustical Society of America, 109(1), Jan. 2001, pp. 185-193.
J. Meyer et al, “A Highly Scalable Spherical Microphone Array Based on an Orthonormal Decomposition of the Soundfield”, Proc. IEEE Int. Conf. Acoustics, Speech & Signal Processing, 2002 (ICASSP'02), May 2002, vol. 2, pp. 1781-1784.
Brandstein et al, Microphone Arrays Signal Processing Techniques and Applications, Springer 2001, ISBN 3-540-41953-5 Springer-Verlag Berlin Heidelberg New York 2001, Printed in Germany, pp. 20-38.
Marc Anciant, “Modélisation du Champ Acoustique Incident au Décollage de la Fusée Ariane”, Jul. 1996, Ph.D. Thesis, Université de Technologie de Compiégne, France, Chapter 2, pp. 18-45.
A.C.C. Warnok et al , “Voice and Background Noise Levels Measured in Open Offices”, IRC Internal Report IR-837, Jan. 2002, appearing in Review of Acoustical Properties of Human Speakers, pp. 1-20.
Philip M. Morse et al, Theoretical Acoustics, Princeton University Press, 1968, Chapter 7.2, pp. vii and 332-334.
Dedieu Stephane
Moquin Philippe
Chin Vivian
Kurr Jason R
Mitel Networks Corporation
Whittington, Esq. Michelle
LandOfFree
Method for extending the frequency range of a beamformer... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for extending the frequency range of a beamformer..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for extending the frequency range of a beamformer... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2810086