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1. 发明专利

DE68928423T2 未知
公开(公告)号：DE68928423T2
公开(公告)日：1998-06-04
申请号：DE68928423
申请日：1989-05-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUJIMURA KATSUNORI , SAITOH HIROSHI , MATSUMOTO MICHIO
IPC分类号： H04R3/00 , H04N5/232

2. 发明专利

DE68928423D1 未知
公开(公告)号：DE68928423D1
公开(公告)日：1997-12-11
申请号：DE68928423
申请日：1989-05-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUJIMURA KATSUNORI , SAITOH HIROSHI , MATSUMOTO MICHIO
IPC分类号： H04R3/00 , H04N5/232

3. 发明专利

JPH05207587A MICROPHONE DEVICE 失效
公开(公告)号：JPH05207587A
公开(公告)日：1993-08-13
申请号：JP1073092
申请日：1992-01-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUJIMURA KATSUNORI
IPC分类号： H04R3/00
摘要： PURPOSE:To reduce a change in sound quality due to a change in a distance between a microphone and a talker (sound source). CONSTITUTION:Signals from a single directive microphone 1 used for sound collection and an unidirectional microphone 2 being a reference for distance detection are amplified by amplifiers 3, 4. Then signal levels subjected to band division by band pass filters 5, 6 are compared by plural comparators 7, 8, 9. Thus, plural high pass filters 10 are controlled by a comparison signal obtained in this way so as to vary the frequency characteristic of the sound signal from the single directivity microphone.

4. 发明专利

JPH01300679A MICROPHONE DEVICE 失效
公开(公告)号：JPH01300679A
公开(公告)日：1989-12-05
申请号：JP13067588
申请日：1988-05-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUJIMURA KATSUNORI , MATSUMOTO MICHIO
IPC分类号： H04N5/225 , H04R3/00
摘要： PURPOSE:To attain the recording corresponding to a sense of far and near video image and a sense of spread by controlling the rotation information of zoom lens, that is, directivity and sound volume corresponding to the zoom magnification. CONSTITUTION:A couple of light emitting and light receiving elements 1-4 or over are arranged so as to the light emitting and light receiving faces are opposed to reflecting and nonreflecting members 10, 11 which are at least wound and arranged for one turn or over on the external circumference of a rotary barrel of a zoom lens 12 and the radiated light from the light emitting elements 1, 3 is radiated to the reflection nonreflection members 10, 11, and a zoom lens rotary signal obtained by the light receiving elements 2, 4 causes a video image and a sound image, which are interlocked by microphone output variable devices 18, 20, 22. Thus, the directivity and sound volume to the zoom magnification are controlled. Then the recording corresponding to the sense of far and near and the sense of spread of the video image is attained.

5. 发明专利

JPS6439196A STEREOSCOPIC ZOOM MICROPHONE 失效
公开(公告)号：JPS6439196A
公开(公告)日：1989-02-09
申请号：JP19471587
申请日：1987-08-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MATSUMOTO MICHIO , IBARAKI SATORU , FUJIMURA KATSUNORI
IPC分类号： H04R3/00 , H04R5/04
摘要： PURPOSE:To simplify a circuit without losing a function, to miniaturize the titled microphone and to decrease cost by providing two unidirectional microphone units, one bidirectional microphone unit, two level varactors and synthesizers, etc. CONSTITUTION:A first level varactor 5 is connected with a phase shifter 4 to be connected with a first unidirectional microphone unit 1. A second level varactor 6 is connected with a bidirectional microphone unit 3, interlocks the varactor 5 and an output level is varied relatively. A first synthesizer 7 adds the outputs of the varactors 5 and 6 to the output of a second single directivity micro unit 2, a second synthesizer 8 adds the output of the adder 5 to the output of the unit 2 and subtracts the output of the varactor 6. Thus, without losing the function, three synthesizers and one level varactor can be eliminated compared with a conventional constitution, the circuit can be simplified and the miniaturization and the reduction in cost can be attained.

6. 发明专利

JPS6439195A MICROPHONE DEVICE 失效
公开(公告)号：JPS6439195A
公开(公告)日：1989-02-09
申请号：JP19471487
申请日：1987-08-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUJIMURA KATSUNORI , MATSUMOTO MICHIO , IBARAKI SATORU
IPC分类号： H04R3/00
摘要： PURPOSE:To reduce wind noise, etc., to be generated when it is strongly windy and to improve a sound recording quality by providing an attenuator to set the signal of an unidirectional microphone to a low gain and a signal from an adder to a high gain. CONSTITUTION:A part of the output signal of a single directional microphone 1 is separated into a medium-high frequency band by an HPF 10, a part of the output signal of a non-oriented microphone 4 is separated into a low frequency band by a BPF 11, respectively inputted to an adder 12 and added. The other part of the output signal of microphones 1 and 4 is inputted to a deciding part 7 through level detecting parts 3 and 6, and a whether wind noise or a voice signal is obtained is decided. When the judgement of the part 7 obtains wind noise, an attenuator 8 makes the signal of the microphone 1 into a low gain, the signal from the adder 12 into a high gain, and switches automatically and successively the two signals being gain-set. Thus, the wind noise at time of strong wind, and mechanical noise, etc., generated from the environment of the microphone are reduced and the recording quality and operability are improved.

7. 发明专利

JPS64895A DIRECTIONAL MICROPHONE 失效
公开(公告)号：JPS64895A
公开(公告)日：1989-01-05
申请号：JP15589687
申请日：1987-06-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MATSUMOTO MICHIO , IBARAKI SATORU , FUJIMURA KATSUNORI
IPC分类号： H04R3/00
摘要： PURPOSE:To obtain a microphone which is miniaturized and has sharp in directivity and in addition, has a good directivity characteristic even at a high frequency by making a phase shifter into a multistage. CONSTITUTION:A sound wave coming from an angle theta against the main axis direction of the directivity of a microphone element, is made incident on the microphone elements 1a and 1b while keeping a prescribed phase difference. The output of the element 1b, after its phase is delayed by the set 2 of the multistaged phase shifter, is subtracted from the output of the element 1a by a synthesizer 3, and afterward, is outputted through an equalizer 4.

8. 发明专利

JPS6352520B2 失效
公开(公告)号：JPS6352520B2
公开(公告)日：1988-10-19
申请号：JP11753880
申请日：1980-08-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NAONO HIROYUKI , MATSUMOTO MICHIO , FUJIMURA KATSUNORI , YASUNO ISANAGA
IPC分类号： H04R1/40 , H04R3/00 , H04R5/027

9. 发明专利

JPS63187933A ON VEHICLE AUDIO DEVICE 失效
公开(公告)号：JPS63187933A
公开(公告)日：1988-08-03
申请号：JP2084087
申请日：1987-01-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HATTORI KATSUJI , MATSUMOTO MICHIO , FUJIMURA KATSUNORI
IPC分类号： H04B10/2507 , H04B1/64 , H04B10/114
摘要： PURPOSE:To reproduce a sound having a high quality without being caught by various electromagnetic induction noises generated in a vehicle, by providing an optical transmitting unit and an optical receiving unit using a signal light of infrared rays, in the vehicle. CONSTITUTION:An audio electric signal inputted to an optical transmitting unit A through a changeover switch 2 from an equipment 1 is supplied to a light source 14 through a level compressor 11 and an oscillation modulating part 12, and a signal light 15 of infrared rays is radiated into a vehicle from a light source 12. This radiated signal light 15 is received by a receiving part 16 of an optical receiving unit B and converted to an electric signal. This electric signal is supplied to a loudspeaker 6 through an amplifying part 17, a demodulating part 18, a level expanding part 19 and a power amplifier 4.

10. 发明专利

JPS6338400A WIRELESS SPEAKER SYSTEM 失效
公开(公告)号：JPS6338400A
公开(公告)日：1988-02-18
申请号：JP18217886
申请日：1986-08-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUJIMURA KATSUNORI , HATTORI KATSUJI , MATSUMOTO MICHIO , MIYAGAWA NAOYASU , NURIYA KOZO
IPC分类号： H04B10/11 , H04B10/114 , H04S5/02
摘要： PURPOSE:To obtain the acousitic signals which excel in the anti-electromagnetic inductive properties as well as in the quality and to ensure high performance with no radio wave fault, by using plural speakers, a light emitting diode with converts the electric signal applied to a rear speaker into an optical signal and transmits it into a space, a photodiode which converts the optical signal into an electric signal, and an amplifier. CONSTITUTION:The signal (r) for rear speakers 30 and 31 undergoes the frequency modulation via a modulator 2. In the same way, the rear speaker signal (l) also undergoes the frequency modulation via a modulator 3 and an oscillator 4. These modulated signals (r) and (l) are mixed by a mixer 5 and converted into optical signals by a light emitting diode drive circuit 6 and a light emitting diode 7 to be transmitted into a space. These transmitted optical signals are received by photodiodes 8 and 16 and converted into electric signals. Both signals (r) and (l) are discriminated from each other by a tuning circuit set into a high frequency amplifier 10. Furthermore a muting circuit is added to cut the noises produced in a no-signal mode and therefore the unpleasantness is eliminated.

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