公开(公告)号：US06807281B1

公开(公告)日：2004-10-19

申请号：US09380816

申请日：1999-09-08

申请人： Toru Sasaki ,  Kaoru Gyotoku ,  Kohei Asada

发明人： Toru Sasaki ,  Kaoru Gyotoku ,  Kohei Asada

IPC分类号： H04R300

CPC分类号： H04R1/403 ,  H04R3/00 ,  H04R3/12 ,  H04R2205/022 ,  H04R2217/03 ,  H04R2499/15

摘要： A loudspeaker apparatus includes a modulator for frequency-modulating an audio signal to a signal of a frequency band and an ultrasonic generating device adapted to be driven by the output signal of the modulator. The modulator frequency-modulates the audio signal into a first signal modulated on the basis of a an ultrasonic frequency and a source signal and a second signal modulated on the basis of the ultrasonic second frequency and an inverted version of the source signal. As the ultrasonic generating device is driven by the modulated signals, it emits an ultrasonic wave of a first frequency and an ultrasonic wave of a second frequency and the frequency component corresponding to the difference of the two frequencies provides audible sound. Since the ultrasonic generating device emits ultrasonic waves, an ultradirectivity can be realized.

摘要翻译： 扬声器装置包括用于将音频信号频率调制为频带的信号的调制器和适于由调制器的输出信号驱动的超声波发生装置。 调制器将音频信号频率调制成基于超声频率和源信号调制的第一信号，以及基于超声波第二频率和源信号的反相形式调制的第二信号。 当超声波发生装置被调制信号驱动时，它发射第一频率的超声波和第二频率的超声波，并且与两个频率的差相对应的频率分量提供可听见的声音。 由于超声波发生装置发射超声波，因此可以实现超导。

公开(公告)号：US06766025B1

公开(公告)日：2004-07-20

申请号：US09267618

申请日：1999-03-15

申请人： Paul S. Levy ,  D. C. Sessions

发明人： Paul S. Levy ,  D. C. Sessions

IPC分类号： H04R300

CPC分类号： H04R29/001 ,  H04R3/04 ,  H04R27/00 ,  H04S7/301

摘要： A programmable speaker uses characterization data stored within the memory of the speaker and digital signal processing (DSP) to digitally perform transform functions on input audio signals to compensate for speaker related distortion and listening environment distortion. In a manufacturing environment, a non-intrusive system and method for tuning the speaker is performed by applying a reference signal and a control signal to the input of the programmable speaker. A microphone detects an audible signal corresponding to the input reference signal at the output of the speaker and feeds it back to a tester which analyzes the frequency response of the speaker by comparing the input reference signal to the audible output signal from the speaker. Depending on the results of the comparison, the tester provides to the speaker an updated digital control signal with new characterization data which is then stored in the speaker memory and used to again perform transform functions on the input reference signal. The tuning feedback cycle continues until the input reference signal and the audible output signal from the speaker exhibit the desired frequency response as determined by the tester. In a consumer environment, a microphone is positioned within selected listening environments and the tuning device is again used to update the characterization data to compensate for distortion affects detected by the microphone within the selected listening environment.

摘要翻译： 可编程扬声器使用存储在扬声器和数字信号处理（DSP）的存储器内的特征数据来对输入音频信号进行数字执行变换功能，以补偿与扬声器有关的失真和听觉环境失真。 在制造环境中，通过将参考信号和控制信号施加到可编程扬声器的输入来执行用于调谐扬声器的非侵入式系统和方法。 麦克风在扬声器的输出端检测与输入参考信号对应的可听信号，并将其反馈给测试器，该测试仪通过将输入参考信号与来自扬声器的可听输出信号进行比较来分析扬声器的频率响应。 根据比较的结果，测试者向扬声器提供具有新特征数据的更新的数字控制信号，然后将其存储在扬声器存储器中，并用于再次对输入参考信号执行变换功能。 调谐反馈周期继续，直到来自扬声器的输入参考信号和可听见的输出信号显示出由测试仪确定的期望的频率响应。 在消费者环境中，麦克风位于选定的聆听环境内，并且调谐装置再次用于更新表征数据以补偿由选定的收听环境中的麦克风检测到的失真影响。

公开(公告)号：US06760450B2

公开(公告)日：2004-07-06

申请号：US10035507

申请日：2001-10-26

申请人： Naoshi Matsuo

发明人： Naoshi Matsuo

IPC分类号： H04R300

CPC分类号： H04R3/005 ,  H04R2201/403 ,  H04R2410/05 ,  H04R2430/23

摘要： A microphone array apparatus includes a microphone array including microphones, one of the microphones being a reference microphone, filters receiving output signals of the microphones, and a filter coefficient calculator which receives the output signals of the microphones, a noise and a residual signal obtained by subtracting filtered output signals of the microphones other than the reference microphone from a filtered output signal of the reference microphone and which obtain filter coefficients of the filters in accordance with an evaluation function based on the residual signal.

公开(公告)号：US06683964B1

公开(公告)日：2004-01-27

申请号：US08665061

申请日：1996-05-15

申请人： John Charles Baumhauer, Jr. ,  Jeffrey Phillip McAteer ,  Alan Dean Michel

发明人： John Charles Baumhauer, Jr. ,  Jeffrey Phillip McAteer ,  Alan Dean Michel

IPC分类号： H04R300

CPC分类号： H04R3/005 ,  H04R1/406

摘要： A direction finder arrangement advantageously employs a plurality of transducers to derive a plurality of predetermined polar directivity patterns each of which has a predetermined spatial orientation pointing in a predetermined fixed direction relative to each of the other polar directivity patterns. The polar directivity patterns detect a plurality of amplitude values of a propagating wave approaching at different angles relative to the plurality of spatially oriented polar directivity patterns. Then, the detected wave amplitude values are processed to determine an estimate of a direction toward the source of the arriving wave. More specifically, the detected amplitude values are processed to obtain an estimate of the directional orientation of a hypothetical polar directivity pattern pointing toward the source of the arriving wave.

摘要翻译： 取向器装置有利地使用多个换能器来导出多个预定极性方向性图案，每个预定极点方向图具有相对于每个其它极性方向性图案指向预定固定方向的预定空间取向。 极坐标方向性图案检测相对于多个空间取向极性方向性图案以不同角度接近的传播波的多个振幅值。 然后，对检测到的波幅值进行处理，以确定朝向到达波源的方向的估计。 更具体地，处理检测到的振幅值以获得指向到达波源的假想极坐标方向图的方向取向的估计。

公开(公告)号：US06618485B1

公开(公告)日：2003-09-09

申请号：US09100033

申请日：1998-06-19

申请人： Naoshi Matsuo

发明人： Naoshi Matsuo

IPC分类号： H04R300

CPC分类号： H04R3/005

摘要： The present invention provides a microphone array including a small number of real microphone that can realize the same characteristics as a microphone array including a large number of real microphones. The microphone array of the present invention includes a plurality of real microphones, at least one virtual microphone, and an estimator for estimating a sound signal to be received by the virtual microphone based on the sound signals received by the real microphones.

公开(公告)号：US06608905B1

公开(公告)日：2003-08-19

申请号：US09216698

申请日：1998-12-18

申请人： John M. Muza ,  Roberto Sadkowski ,  Martin Sallenhag ,  Heino Wendelrup

发明人： John M. Muza ,  Roberto Sadkowski ,  Martin Sallenhag ,  Heino Wendelrup

IPC分类号： H04R300

CPC分类号： H04R29/004

摘要： A microphone bias current detection circuit includes: a microphone circuit 18; an amplifier 10 having a first output and a second output, the first output is coupled to the microphone circuit 18 for providing a bias current to the microphone circuit 18, the second output provides a sampled current Is proportional to the bias current; a first switch 30 having a first end coupled to the second output of the amplifier 10; a resistor 38 having a first end coupled to a second end of the first switch 30; and a second switch 32 coupled between the first end of the resistor 38 and a reference current source.

摘要翻译： 麦克风偏置电流检测电路包括：麦克风电路18; 具有第一输出和第二输出的放大器10，第一输出耦合到麦克风电路18，用于向麦克风电路18提供偏置电流，第二输出提供与偏置电流成比例的采样电流Is; 具有耦合到放大器10的第二输出的第一端的第一开关30; 电阻器38，其具有耦合到第一开关30的第二端的第一端; 以及耦合在电阻器38的第一端和参考电流源之间的第二开关32。

公开(公告)号：US06594367B1

公开(公告)日：2003-07-15

申请号：US09427410

申请日：1999-10-25

申请人： Joseph Marash ,  Baruch Berdugo

发明人： Joseph Marash ,  Baruch Berdugo

IPC分类号： H04R300

CPC分类号： H01Q3/40 ,  G10K11/341 ,  H01Q25/00

摘要： A sensor array receiving system which incorporates one or more filters that are capable of adaptive and/or fixed operation. The filters are defined by a multiple of coefficients and the coefficients are set so as to maximize the signal to noise ratio of the receiving array's output. In one preferred embodiment, the filter coefficients are adaptively determined and are faded into a predetermined group of fixed values upon the occurrence of a specified event. Thereby, allowing the sensor array to operate in both the adaptive and fixed modes, and providing the array with the ability to employ the mode most favorable for a given operating environment. In another preferred embodiment, the filter coefficients are set to a fixed group of values which are determined to be optimal for a predefined noise environment.

摘要翻译： 传感器阵列接收系统，其包括能够进行自适应和/或固定操作的一个或多个滤波器。 滤波器由多个系数定义，并且系数被设置为使接收阵列的输出的信噪比最大化。 在一个优选实施例中，滤波器系数被自适应地确定，并且在发生指定事件时被褪色成预定的一组固定值。 因此，允许传感器阵列在自适应模式和固定模式下操作，并且为阵列提供使用对给定操作环境最有利的模式的能力。 在另一个优选实施例中，将滤波器系数设置为对于预定义的噪声环境被确定为最佳的固定值组。

公开(公告)号：US06522757B1

公开(公告)日：2003-02-18

申请号：US09265404

申请日：1999-03-10

申请人： Shigenori Hiramatsu ,  Fuminori Sato ,  Koji Osuga ,  Akihiro Ozono ,  Yuichi Honda

发明人： Shigenori Hiramatsu ,  Fuminori Sato ,  Koji Osuga ,  Akihiro Ozono ,  Yuichi Honda

IPC分类号： H04R300

CPC分类号： H04R3/12

摘要： In a bass intensifying device for a speaker system, a passive radiator (5) constructed by a speaker having a voice coil (7) is disposed at a location where it receives a sound pressure from a main speaker (1) driven by a main amplifier (4). A motion feed-back circuit independently of the main amplifier (4) for driving the main speaker (1) is connected to this passive radiator (5). Since the motion feed-back circuit is closed only in the passive radiator (5), it is possible to reinforce the bass while preventing the motion feed-back circuit from degrading the sound quality of the main speaker (1). The selection of the main amplifier 4 for driving the main speaker is free.

摘要翻译： 在用于扬声器系统的低音增强装置中，由具有音圈（7）的扬声器构成的无源辐射器（5）设置在从主扬声器（1）接收声压的位置处，主扬声器 （4）。 独立于用于驱动主扬声器（1）的主放大器（4）的运动反馈电路连接到该无源辐射器（5）。 由于运动反馈电路仅在无源辐射器（5）中闭合，所以可以在防止运动反馈电路降低主扬声器（1）的声音质量的同时加强低音。 用于驱动主扬声器的主放大器4的选择是免费的。

公开(公告)号：US06353670B1

公开(公告)日：2002-03-05

申请号：US08920545

申请日：1997-08-27

申请人： Donald R. Gasner

发明人： Donald R. Gasner

IPC分类号： H04R300

CPC分类号： H04R1/288 ,  H04R3/002

摘要： A speaker 20 has a cavity 28 that has dynamic pressure actively controlled by a pressure control device 42. The control circuit 40 may be analog or digital, open loop, closed loop, or a hybrid open closed loop design. In the closed loop and hybrid versions one or more sensors generate signals for a control circuit 40. In the open loop version predetermined signals independent of cavity pressures drive device 42 and sensors are not used. The pressure control device can alter changes in the dynamic pressure in the cavity 28 to reduce distortion of the sound transducer T1; or produce a multitude of effects on the output of T1 such as maximums and minimums over arbitrary bands, a flat response, simulated passive cavity effects, or other effects not possible with passive cavity designs. The cavity is actively driven to produce arbitrary cavity waves or pressure effects. In this way any arbitrary passive cavity design may be simulated. Additionally other effects not generally practical with passive designs can also be produced, such as resonance at a specific frequency of choice, or resonance over a range of frequencies; minimums and nulls; and simulation of the nulled cavity (vacuum), or the ideal enclosure.

摘要翻译： 扬声器20具有由压力控制装置42主动控制的动态压力的空腔28.控制电路40可以是模拟或数字，开环，闭环或混合开放闭环设计。 在闭环和混合版本中，一个或多个传感器产生用于控制电路40的信号。在开环版本中，与腔压力无关的预定信号驱动装置42和传感器不被使用。 压力控制装置可以改变空腔28中的动态压力的变化，以减少声音换能器T1的失真; 或者对T1的输出产生多种影响，例如任意频带上的最大值和最小值，平坦响应，模拟无源腔效应或无源腔设计中不可能的其他效果。 腔被主动驱动以产生任意的腔波或压力效应。 以这种方式，可以模拟任何任意的无源空腔设计。 此外，还可以产生通常无用的被动设计的其他效果，例如在特定频率选择的谐振或频率范围上的谐振; 最小值和零点; 和空腔模拟（真空）或理想的外壳。

公开(公告)号：US06285769B1

公开(公告)日：2001-09-04

申请号：US08843678

申请日：1997-04-10

申请人： Jonathan Sidney Edelson ,  Nicholas Paul Ward

发明人： Jonathan Sidney Edelson ,  Nicholas Paul Ward

IPC分类号： H04R300

CPC分类号： H04R3/002

摘要： The present invention is a microphone that applies the principle of negative feedback directly to the diaphragm, greatly reducing the non-linearity of the diaphragm. In a further embodiment, digital negative feedback is used, incorporating the diaphragm into the digitization loop of a sigma-delta converter, creating a direct sound pressure to digital electrical output converter. In one embodiment, positive feedback is used in an analog circuit, causing a negative feedback response on the diaphragm.

摘要翻译： 本发明是将负反馈原理直接应用于隔膜的麦克风，大大降低了隔膜的非线性。 在另一实施例中，使用数字负反馈，将隔膜结合到Σ-Δ转换器的数字化环路中，产生对数字电输出转换器的直接声压。 在一个实施例中，在模拟电路中使用正反馈，导致隔膜上的负反馈响应。