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公开(公告)号：US5043676A
公开(公告)日：1991-08-27
申请号：US89114
申请日：1987-08-25
申请人： Takeshi Sato , Hideo Yamamoto , Toshikazu Yoshimi , Shuichi Mori , Akio Tokumo
发明人： Takeshi Sato , Hideo Yamamoto , Toshikazu Yoshimi , Shuichi Mori , Akio Tokumo
CPC分类号： H03G3/3015 , H03G9/025
摘要： In an ALC circuit for automatically performing an amplitude compression control operation according to the output level of a low frequency amplifier circuit, the output level of the amplifier circuit is subjected to amplitude compression according to the level of a control signal which is outputted in correspondence to the output level of the amplifier circuit. The differentiation time constant of a differentiating circuit (or cutoff frequency of a high pass filter) provided on the output side of the amplifier circuit is controlled according to the level of the control signal to control the cutoff frequency for the frequency band subjected to amplitude compression.
摘要翻译： 在用于根据低频放大器电路的输出电平自动执行幅度压缩控制操作的ALC电路中，放大器电路的输出电平根据控制信号的电平进行幅度压缩，控制信号的电平对应于 放大器电路的输出电平。 根据控制信号的电平来控制设置在放大器电路的输出侧的微分电路（或高通滤波器的截止频率）的微分时间常数，以控制经受振幅压缩的频带的截止频率 。
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公开(公告)号：US4928071A
公开(公告)日：1990-05-22
申请号：US213051
申请日：1988-06-29
申请人： Hideo Yamamoto , Takeshi Sato , Toshikazu Yoshimi , Shuichi Mori , Akio Tokumo
发明人： Hideo Yamamoto , Takeshi Sato , Toshikazu Yoshimi , Shuichi Mori , Akio Tokumo
IPC分类号： H03G5/16
CPC分类号： H03G5/165
摘要： A limiter circuit divides the output of a low frequency amplifier into two parts which are respectively high pass filtered, and low frequency amplitude limited. The two parts may be recombined to form an audio output which is freed from clipping distortion at the low end, while the high end is increased. The invention is especially suited for environments such as automobiles, where the ambient noise level may be high.
摘要翻译： 限幅电路将低频放大器的输出分为两部分，分别是高通滤波和低频振幅限制。 这两个部分可以被重新组合以形成一个音频输出，该音频输出在高端被削弱失真，而高端增加。 本发明特别适用于环境噪声水平可能高的汽车等环境。
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公开(公告)号：US4622691A
公开(公告)日：1986-11-11
申请号：US739954
申请日：1985-05-31
申请人： Akio Tokumo , Yoshiro Kunugi , Toshikazu Yoshimi , Shinjiro Kato , Yoshio Sasaki , Makoto Odaka , Takeshi Sato
发明人： Akio Tokumo , Yoshiro Kunugi , Toshikazu Yoshimi , Shinjiro Kato , Yoshio Sasaki , Makoto Odaka , Takeshi Sato
CPC分类号： H03G5/00 , H04S7/307 , H04R2499/13 , H04R5/02 , H04S7/302
摘要： A mobile sound field correcting system for correcting an acoustic characteristic in a vehicle sound field formed by direct waves radiated from loudspeakers and reflected waves thereof providing satisfactory acoustic characteristics for different vehicles and different listening points within a vehicle. A first correcting means corrects a power spectrum of each loudspeaker in a frequency range above a frequency at which a decrease of starts of the power spectrum in a high-frequency range of each loudspeaker. Second correcting means corrects for irregularities in the frequency characteristic of each loudspeaker caused by interference of the direct waves with the reflected waves in a frequency lower than the drop-off frequency of this power spectrum.
摘要翻译： 一种移动声场校正系统，用于校正由扬声器和反射波辐射的直接波形成的车辆声场中的声学特性，为车辆内的不同车辆和不同收听点提供令人满意的声学特性。 第一校正装置在每个扬声器的高频范围内功率谱开始减小的频率以上的频率范围内校正每个扬声器的功率谱。 第二校正装置校正由直流波与反射波的干扰导致的每个扬声器的频率特性的不规则性，其频率低于该功率谱的下降频率。
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公开(公告)号：US4868878A
公开(公告)日：1989-09-19
申请号：US077071
申请日：1987-07-28
申请人： Yoshiro Kunugi , Akio Tokumo , Toshikazu Yoshimi , Yoshio Sasaki , Shinjiro Kato , Shuuichi Mori , Makoto Odaka , Takeshi Sato
发明人： Yoshiro Kunugi , Akio Tokumo , Toshikazu Yoshimi , Yoshio Sasaki , Shinjiro Kato , Shuuichi Mori , Makoto Odaka , Takeshi Sato
摘要： A sound field correcting system for correcting for multipath frequency-characteristic distortion in an acoustic reproducing system. In one embodiment, the level and delay of an original signal are adjusted and superposed on the original signal so as to obtain a signal which, when reproduced by a loudspeaker, yields a sound pattern at a listening point having a flat frequency characteristic. The delay adjustment is effected in accordance with a difference between the travel distances of direct and reflected sound waves to the listening point.
摘要翻译： 一种用于校正声学再现系统中的多径频率特性失真的声场校正系统。 在一个实施例中，将原始信号的电平和延迟调整并重叠在原始信号上，以便获得当由扬声器再现时在具有平坦频率特性的收听点处产生声音模式的信号。 根据直接和反射的声波到收听点的移动距离之间的差异来实现延迟调整。
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5.发明授权Method and apparatus for measuring and correcting acoustic characteristic in sound field 失效用于测量和校正声场声学特性的方法和装置
公开(公告)号：US4739513A
公开(公告)日：1988-04-19
申请号：US739654
申请日：1985-05-31
申请人： Yoshiro Kunugi , Shinichi Suzuki , Masayuki Kato , Akio Tokumo , Toshikazu Yoshimi , Takeshi Sato
发明人： Yoshiro Kunugi , Shinichi Suzuki , Masayuki Kato , Akio Tokumo , Toshikazu Yoshimi , Takeshi Sato
摘要： The acoustic transmission characteristics of a sound field, such as in the passenger compartment of a vehicle, are measured by placing microphones at the positions of ears of a dummy mannequin having a sound absorbing characteristic similar to that of a clothed adult human. The transmission characteristics are then corrected, such as with an automatic graphic equalizer, to provide optimized listening conditions inside the sound field for an actual listener. The use of the invention results in a listener's perception of completely natural sound.
摘要翻译： 通过将麦克风放置在具有与穿着成年人相似的吸声特性的虚拟人体模型的耳朵的位置来测量声场的声学传播特性，例如车辆的乘客室。 然后校正传输特性，例如使用自动图形均衡器，以为实际听众提供声场内的优化聆听条件。 本发明的使用导致听众对完全自然的声音的感知。
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公开(公告)号：US4648117A
公开(公告)日：1987-03-03
申请号：US739652
申请日：1985-05-31
申请人： Yoshiro Kunugi , Akio Tokumo , Toshikazu Yoshimi , Shinjiro Kato , Yoshio Sasaki , Makoto Odaka , Takeshi Sato
发明人： Yoshiro Kunugi , Akio Tokumo , Toshikazu Yoshimi , Shinjiro Kato , Yoshio Sasaki , Makoto Odaka , Takeshi Sato
CPC分类号： H04S7/307 , H03G3/00 , H03G5/00 , H04S1/002 , H04R2499/13
摘要： A sound field correcting device for use in a stereophonic system intended for vehicular use. Speakers are installed on opposite sides of both the front and rear seats of the vehicle. The number of persons seated in the vehicle is determined and applied to a correcting unit. When plural persons are seated in the vehicle, the sound pressure levels in the high-frequency range of loudspeakers is increased. Also, the sound pressure levels of the speakers can be corrected in accordance with the positions at which persons are seated in the vehicle.
摘要翻译： 一种在用于车辆用途的立体声系统中使用的声场校正装置。 扬声器安装在车辆前后座椅的两侧。 确定坐在车辆中的人数并将其应用于校正单元。 当多个人坐在车辆中时，扬声器的高频范围内的声压级增加。 此外，可以根据人员坐在车辆中的位置来校正扬声器的声压级。
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公开(公告)号：US4914707A
公开(公告)日：1990-04-03
申请号：US193136
申请日：1988-05-06
CPC分类号： H04R9/02 , H04R5/02 , H04R9/04 , H04R2499/13 , H04R9/025
摘要： A speaker system for a vehicle having both front and rear speakers. Both speakers are connected in parallel to an amplifier. The impedance of the rear speaker circuit is made greater than that of the front speaker circuit. A resistor may be placed in series with the rear speaker or a shorting ring may be attached to the coil of the front speaker to decrease the high frequency impedance.
摘要翻译： 一种用于车辆的扬声器系统，其具有前置扬声器和后置扬声器。 两个扬声器与放大器并联连接。 后置扬声器电路的阻抗大于前置扬声器电路的阻抗。 可以将电阻器与后置扬声器串联放置，或者可以将短路环连接到前置扬声器的线圈以降低高频阻抗。
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公开(公告)号：US4980914A
公开(公告)日：1990-12-25
申请号：US418042
申请日：1989-10-06
申请人： Yoshiro Kunugi , Akio Tokumo , Toshikazu Yoshimi , Yoshio Sasaki , Shinjiro Kato
发明人： Yoshiro Kunugi , Akio Tokumo , Toshikazu Yoshimi , Yoshio Sasaki , Shinjiro Kato
摘要： A sound field correcting system for correcting for mulitpath frequency-characteristic distortion in an acoustic reproducing system. In one embodiment, the level and delay of an original signal are adjusted and superposed on the original signal so as to obtain a signal which, when reproduced by a loudspeaker, yields a sound pattern at a listening point having a flat frequency characteristic. The delay adjustment is effected in accordance with a difference between the travel distances of direct and reflected sound waves to the listening point.
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公开(公告)号：US5396563A
公开(公告)日：1995-03-07
申请号：US249663
申请日：1994-05-26
申请人： Toshikazu Yoshimi
发明人： Toshikazu Yoshimi
CPC分类号： H04R9/066 , H04R1/1016 , H04R1/1083
摘要： An earphone includes an earplug of sound insulating material which is insertable in the external auditory meatus of an ear, and an elastic vibration generator responsive to an electric signal supplied thereto for generating and applying an elastic wave corresponding to the supplied electric signal to an outer end of the earplug inserted in the external auditory meatus. The elastic vibration generator may be held in or out of contact with the earplug, so that the elastic wave generated by the elastic vibration generator can be applied directly or indirectly to the earplug. The earphone may be combined with a helmet or a headband. The earplug is effective to prevent external noise from being transmitted to the ear drum of the ear, and also allows desired sound to be transmitted in the form of an elastic wave reliably and clearly to the ear drum.
摘要翻译： 一种耳机包括可插入耳部的外耳道中的隔音材料耳塞，以及弹性振动发生器，响应于提供给其的电信号，产生并将与所提供的电信号对应的弹性波施加到外端 的耳塞插入外耳道。 弹性振动发生器可以保持与耳塞接触或不与耳塞接触，使得由弹性振动发生器产生的弹性波可以直接或间接地应用于耳塞。 耳机可以与头盔或头带组合。 耳塞有效地防止外部噪声传递到耳朵的耳鼓，并且还允许期望的声音以弹性波的形式可靠且清楚地传递到耳鼓。
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10.发明授权Piezoelectric electro-acoustic diaphragm transducer with composite resilient backing 失效具有复合弹性背衬的压电电声隔膜换能器
公开(公告)号：US3976897A
公开(公告)日：1976-08-24
申请号：US549339
申请日：1975-02-12
CPC分类号： H04R17/005 , Y10S310/80
摘要： An electro-acoustic transducer with a piezoelectric diaphragm which is backed with a plurality of different resilient members for imparting a suitable resiliency and/or tension to said diaphragm to highly improve its acoustic characteristics with a simple construction.
摘要翻译： 一种具有压电隔膜的电声换能器，其具有多个不同的弹性构件的背面，用于赋予所述隔膜适当的弹性和/或张力，以通过简单的结构高度改善其声学特性。
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