Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate
2000-12-20
2003-07-01
Tran, Sinh (Department: 2643)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Housed microphone
C381S359000
Reexamination Certificate
active
06587569
ABSTRACT:
BACKGROUND
The invention relates to a sound pick-up having a pressure-difference microphone, arranged in a housing, for converting acoustic signals which are produced in the acoustic near field of the sound pick-up into an electric signal.
The invention also relates to a remote control unit, in particular for wireless control of equipment by acoustic input of command signals having a pressure-difference microphone arranged in the housing of the remote control unit.
A known field of application of such sound pick-ups relates, for example, to voice communication in a noisy environment. On the basis of the pressure-difference principle applied in this case, sound produced in the acoustic far field of the sound pick-up can be faded out or at least reduced so far that words spoken in the acoustic near field of the sound pick-up can be transmitted virtually undistorted for the purpose of intelligibility.
Because of these properties, such sound pick-ups are also suitable for remote control devices with voice input of control commands, called voice commands below, into an appropriate remote control unit. However, it has been shown that breathing noises and the manner of pronunciation of specific command words can lead to misinterpretation of a voice command—such as,“p”, in the case of a command word with a consonant which is pronounced hard.
It is therefore the object of the invention to improve intelligibility in the case of a sound pick-up and to improve the recognition of command words in the case of a remote control device with such a sound pick-up.
SUMMARY OF THE INVENTION
The invention is based on the idea of arranging a pressure-difference microphone in a housing, and of providing in one of the housing walls a single opening directed onto the front side of the microphone, for feeding voice commands which can be produced in the acoustic near field of the housing, the aim being to arrange the microphone in the housing in such a way that, and/or to form the air volume which is to surround the microphone, in such a way that the microphone can be irradiated with sound through the opening, using the pressure-difference principle.
This configuration of the sound pick-up has the advantage, moreover, that a wind shield or the like can additionally be arranged in a simple way between the opening and the microphone.
REFERENCES:
patent: 2627932 (1953-02-01), Volkmann et al.
patent: 4858719 (1989-08-01), Fidi et al.
patent: 5263093 (1993-11-01), Nakamura et al.
patent: 5410608 (1995-04-01), Lucey et al.
patent: 6091830 (2000-07-01), Toki
patent: 6201876 (2001-03-01), Niemi et al.
patent: 6275595 (2001-08-01), Lundgren et al.
patent: 3700594 (1987-07-01), None
patent: 19541648 (1997-05-01), None
patent: 19541648 (1997-05-01), None
patent: 2218303 (1989-11-01), None
Adrion Ulrich
Harms Torsten
Laks Joseph J.
Lin Reitseng
Thomson Licensing S.A.
Tran Sinh
Tripoli Joseph S.
LandOfFree
Differential-pressure microphone does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Differential-pressure microphone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential-pressure microphone will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3107564