-
公开(公告)号：US4924962A
公开(公告)日：1990-05-15
申请号：US71829
申请日：1987-07-10
申请人： Kenichi Terai , Shuji Saiki , Kousaku Murata , Katsuaki Satoh , Yoichi Kumura , Yasutoshi Nakama , Michiko Ogawa , Shuichi Obata
发明人： Kenichi Terai , Shuji Saiki , Kousaku Murata , Katsuaki Satoh , Yoichi Kumura , Yasutoshi Nakama , Michiko Ogawa , Shuichi Obata
IPC分类号： H04R1/28
CPC分类号： H04R1/2857 , H04R1/2842 , H04R1/2865
摘要： A sound reproducing apparatus for use in a vehicle having a speaker system constituted by at least one acoustic duct and a speaker unit disposed at a throat of the acoustic duct, an opening formed at the other end of the acoustic duct facing the passenger compartment of a vehicle. The apparatus is arranged such that, F0 and Fs are substantially equal to each other. Where Fs is the lowest frequency in a frequency range within which the imaginary part of the acoustic impedance at the sound radiating surface of the speaker system in the direction of the space within the passsenger compartment is zero and F0 is the low-range resonance frequency of the speaker system itself in the free space.
摘要翻译： 一种用于具有扬声器系统的车辆的声音再现装置，所述扬声器系统由设置在所述声学导管的喉部处的至少一个声学导管和扬声器单元构成，所述扬声器系统形成在所述声学导管的另一端面对所述乘客室 车辆。 该装置被布置成使得F0和Fs彼此基本相等。 其中Fs是在扬声器系统的声辐射表面的声阻抗的虚部在乘客舱内的空间的方向上为零的频率范围内的最低频率，并且F0是低频共振频率 扬声器系统本身在自由空间。
-
2.发明授权
公开(公告)号：US5073946A
公开(公告)日：1991-12-17
申请号：US441918
申请日：1989-11-28
申请人： Katsuaki Satoh , Kazue Sato , Kousaku Murata , Tsuneo Tanaka , Shuji Saiki , Satoshi Takayama , Hiroyuki Takewa , Mitsuhiko Serikawa , Seiichi Ishikawa , Sawako Usuki , Yoichi Kimura , Shuichi Obata
发明人： Katsuaki Satoh , Kazue Sato , Kousaku Murata , Tsuneo Tanaka , Shuji Saiki , Satoshi Takayama , Hiroyuki Takewa , Mitsuhiko Serikawa , Seiichi Ishikawa , Sawako Usuki , Yoichi Kimura , Shuichi Obata
CPC分类号： H04R1/2834 , H04R1/345 , H04R7/04
摘要： A speaker which is thin but which is capable of providing high-fidelity reproduction and ensuring a suitable level of sound pressure even when it is brought close to a wall. A closed chamber is formed behind one part of a disphragm mounted in an enclosure, and an open chamber is formed behind another part of the diaphragm. At least one voice coil driver unit is connected to the diaphragm. The phase difference between sounds radiated from the front and rear surfaces of the diaphragm is increased as large as possible by using an acoustic duct for the sound radiated through the open chamber, thereby minimizing cancellation of sounds and improving the sound pressure level.
-
公开(公告)号：US5025474A
公开(公告)日：1991-06-18
申请号：US249954
申请日：1988-09-27
申请人： Tsuneo Tanaka , Kazue Sato , Hiroyuki Takewa , Akira Kurozuka , Tadashi Tamura , Katsuji Hattori , Satoshi Takayama , Kosaku Murata , Katsuaki Satoh , Mituhiko Serikawa , Youichi Kimura , Shuichi Obata
发明人： Tsuneo Tanaka , Kazue Sato , Hiroyuki Takewa , Akira Kurozuka , Tadashi Tamura , Katsuji Hattori , Satoshi Takayama , Kosaku Murata , Katsuaki Satoh , Mituhiko Serikawa , Youichi Kimura , Shuichi Obata
CPC分类号： H04R1/02 , G03B21/565 , H04R7/04 , H04R9/063
摘要： A speaker system has an acoustic diaphragm and an image projection screen provided on a surface of the diaphragm integrally therewith so as to enable the user to enjoy both realistic image on the screen and powerful sound reproduced through the diaphragm. The rear surface of the diaphragm is closed at a peripheral portion thereof while the central portion of the rear surface of the diaphragm is opened to the exterior, so that the speaker system can provide a high level of reproduced sound pressure in low-pitched region, while the thickness of the speaker is reduced remarkably. The diaphgram can be driven by a plurality of driving units so that the speaker system can operate only with an ordinary stereophonic amplifier. The diaphragm can be composed of a pair of diaphragm elements capable of vibrating independently of each other and the screen may be integrally and commonly attached to the surfaces of these diaphragm elements in such a manner as to allow the diaphragm elements to vibrate independently of each other, whereby the speaker system can operate in stereophonic mode. Any variation in the acoustic characteristic attributable to variation in the condition of installation is compensated for by a change in the ratio of the opened area of the rear surface of the diaphragm to the whole effective vibration area or by a selective provision of a sound absorbing member on the rear side of the cabinet.
摘要翻译： 扬声器系统具有隔膜和与其一体地设置在隔膜表面上的图像投影屏幕，以使用户能够欣赏屏幕上的逼真图像和通过隔膜再现的强大声音。 隔膜的后表面在其周边部分封闭，同时隔膜的后表面的中心部分向外开放，从而扬声器系统可以在低音区域提供高水平的再现声压， 而扬声器的厚度显着降低。 可以通过多个驱动单元来驱动该图像，使得扬声器系统只能用普通的立体声放大器操作。 隔膜可以由能够彼此独立地振动的一对隔膜元件构成，并且屏幕可以一体地并且共同地附接到这些隔膜元件的表面，以允许隔膜元件彼此独立地振动 由此扬声器系统可以以立体声模式操作。 通过改变隔膜后表面的开口面积与整个有效振动面积之间的比例，或通过选择性地设置吸音构件来补偿由于安装条件的变化引起的声学特性的任何变化 在机柜的后侧。
-
公开(公告)号：US5051942A
公开(公告)日：1991-09-24
申请号：US285606
申请日：1988-12-15
CPC分类号： H03G5/005
摘要： A transfer function is determined in accordance with an amplitude characteristic and a phase characteristic. The transfer function is subjected to inverse Fourier transform. An imaginary part of a result of the inverse Fourier transform is set to zero and thereby the result of the inverse Fourier transform is converted into a converted result. The converted result is subjected to Fourier transform. The amplitude characteristic and the phase characteristic are updated in accordance with a result of the Fourier transform. Such processes are reiterated. A primary desired amplitude characteristic is corrected in accordance with the finally-obtained amplitude characteristic so that the primary desired amplitude characteristic is converted into a final desired amplitude characteristic. A final desired phase characteristic is determined in accordance with the finally-obtained phase characteristic. A second transfer function is determined in accordance with the final desired amplitude characteristic and the final desired phase characteristic. The second transfer function is subjected to inverse Fourier transform. Filter factors are calculated from a real part of a result of the inverse Fourier transform of the second transfer function. The calculated filter factors are set in a FIR digital filter.
摘要翻译： 根据振幅特性和相位特性确定传递函数。 传递函数进行傅里叶逆变换。 逆傅立叶变换的结果的虚部被设置为零，从而将傅里叶逆变换的结果转换为转换结果。 转换结果进行傅里叶变换。 根据傅立叶变换的结果更新振幅特性和相位特性。 重申这些过程。 根据最终获得的幅度特性来校正主期望幅度特性，使得主期望幅度特性被转换成最终期望的幅度特性。 根据最终获得的相位特性确定最终期望的相位特性。 根据最终期望的振幅特性和最终期望的相位特性来确定第二传递函数。 第二传递函数进行傅里叶逆变换。 根据第二传递函数的逆傅立叶变换的结果的实部计算滤波因数。 计算的滤波器因子在FIR数字滤波器中设置。
-
5.发明授权Digital equalizer apparatus enabling separate phase and amplitude characteristic modification 失效数字均衡器装置可实现单独的相位和幅度特性修改
公开(公告)号：US4888808A
公开(公告)日：1989-12-19
申请号：US171713
申请日：1988-03-22
IPC分类号： H03G5/00
摘要： A digital equalizer for audio system applications is based on a FIR (finite impulse response) digital filter whose amplitude and phase/frequency characteristics can be respectively independently established in accordance with input data representing an arbitrary amplitude/frequency characteristic and input phase data from which an arbitrary phase/frequency characteristic for the filter can be derived. In addition to audio frequency response equalization, the apparatus can be provided with a microphone howl suppression function.
摘要翻译： 用于音频系统应用的数字均衡器基于FIR（有限脉冲响应）数字滤波器，其幅度和相位/频率特性可以根据表示任意幅度/频率特性的输入数据和输入相位数据分别独立地建立， 可以推导出滤波器的任意相位/频率特性。 除音频响应均衡外，该装置还可以提供麦克风啸声抑制功能。
-
公开(公告)号：US4484383A
公开(公告)日：1984-11-27
申请号：US390609
申请日：1982-06-21
CPC分类号： H04R31/003 , H04R7/10 , Y10T156/1003 , Y10T29/49575 , Y10T29/49906 , Y10T428/24149
摘要： A multi-layer block to be developed into a disk having a honeycomb construction is initially developed into a columnar block, and then the bottom of the columnar block is radially developed for obtaining a core of a speaker diaphragm. A suitable circular thin layer is attached to the top and bottom of the core to complete a diaphragm. The columnar block may be developed by means of a cone-shaped tool into a truncated cone, and this truncated cone may be further developed into a flat disk by applying a force to the top thereof. Since the forces on development are applied to the block uniformly, the density of hexagonal sections of the honeycomb construction is uniform throughout the entire circumference of the core providing superior speaker characteristics.
摘要翻译： 开发成具有蜂窝结构的盘的多层块最初被开发成柱状块，然后将柱状块的底部径向展开以获得扬声器隔膜的芯。 将合适的圆形薄层连接到芯的顶部和底部以完成隔膜。 柱状块可以通过锥形工具显影成截头圆锥体，并且该截锥体可以通过向其顶部施加力而进一步显影成平盘。 由于开发力均匀地应用于块体，蜂窝结构的六边形部分的密度在芯的整个圆周上是均匀的，从而提供优异的扬声器特性。
-
公开(公告)号：US5023913A
公开(公告)日：1991-06-11
申请号：US358282
申请日：1989-05-26
申请人： Masaharu Matsumoto , Katsuaki Satoh , Seiichi Ishikawa , Mitsuhiko Serikawa , Akihisa Kawamura , Hikari Hashimoto
发明人： Masaharu Matsumoto , Katsuaki Satoh , Seiichi Ishikawa , Mitsuhiko Serikawa , Akihisa Kawamura , Hikari Hashimoto
摘要： An apparatus for changing a sound field, comprising at least two signal processing means, which can smoothly and continuously switch a sound field into an arbitrary sound field without a break of signals by alternately switching one of the signal processing means into the other.
-
公开(公告)号：US4896285A
公开(公告)日：1990-01-23
申请号：US144477
申请日：1988-01-15
CPC分类号： H03H17/06 , H03H17/0211
摘要： An apparatus for calculating a filter factor for a digital filter which can be simply constructed and in which the time period for calculation can be shortened as compared with conventional techniques. The apparatus has an input circuit for inputting a desirable frequency property, a division circuit for dividing the inputted frequency property into a plurality of frequency bands, and a calculating circuit for obtaining filter factors for realizing a frequency property of each of the divided frequency bands. The input circuit inputs the frequency property with a frequency resolution corresponding to the number of the filter factors. The division circuit performs a correction for a division so that the frequency property becomes zero from a frequency over the high cut-off frequency of a band-pass filter toward the Nyquist frequency of the frequency band corresponding to the transversal filter, the Nyquist frequency being 1/2 of the sampling frequency. The calculating circuit has a transformation unit for performing a Hilbert transformation or a linear phase transformation with respect to the respective frequency properties divided by the division circuit.
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.03 秒)
