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    ADAPTIVE SELF-CALIBRATION OF SMALL MICROPHONE ARRAY BY SOUNDFIELD APPROXIMATION AND FREQUENCY DOMAIN MAGNITUDE EQUALIZATION
    1.
    发明申请
    ADAPTIVE SELF-CALIBRATION OF SMALL MICROPHONE ARRAY BY SOUNDFIELD APPROXIMATION AND FREQUENCY DOMAIN MAGNITUDE EQUALIZATION 有权
    通过SOUNDFIELD近似和频域扩展平均化对小麦克风阵列的自适应自校准

    公开(公告)号：US20130170666A1

    公开(公告)日：2013-07-04

    申请号：US13339826

    申请日：2011-12-29

    Applicant: Samuel Samsudin Ng ,  Muralidhar Karthik ,  Sapna George

    Inventor： Samuel Samsudin Ng ,  Muralidhar Karthik ,  Sapna George

    IPC: H04R3/00

    CPC classification number: H04R29/006 ,  H04R3/005

    Abstract: Methods and apparatus for self-calibration of small-microphone arrays are described. In one embodiment, self-calibration is based upon a mathematical approximation for which a detected response by one microphone should approximately equal a combined response from plural microphones in the array. In a second embodiment, self-calibration is based upon matching gains in each of a plurality of Bark frequency bands, and applying the matched gains to frequency domain microphone signals such that the magnitude response of all the microphones in the array approximates an average magnitude response for the array. The methods and apparatus may be implemented in hearing aids or small audio devices and used to mitigate adverse aging and mechanical effects on acoustic performance of small-microphone arrays in these systems.

    Abstract translation: 描述了用于小麦克风阵列的自校准的方法和装置。 在一个实施例中，自校准基于一个数学近似，一个麦克风的检测到的响应应近似等于阵列中多个麦克风的组合响应。 在第二实施例中，自校准基于多个Bark频带中的每一个中的匹配增益，并将匹配增益应用于频域麦克风信号，使得阵列中的所有麦克风的幅度响应近似于平均幅度响应 为阵列。 该方法和装置可以在助听器或小型音频装置中实现，并且用于减轻这些系统中小麦克风阵列的声学性能的不利老化和机械效应。

    AUDIO ACQUISITION SYSTEMS AND METHODS
    2.
    发明申请
    AUDIO ACQUISITION SYSTEMS AND METHODS 审中-公开
    音频采集系统和方法

    公开(公告)号：US20130148814A1

    公开(公告)日：2013-06-13

    申请号：US13316456

    申请日：2011-12-10

    Applicant: Muralidhar KARTHIK ,  Samuel Samsudin NG ,  Sapna GEORGE

    Inventor： Muralidhar KARTHIK ,  Samuel Samsudin NG ,  Sapna GEORGE

    IPC: H04R29/00

    CPC classification number: H04R3/005 ,  G01S3/8083 ,  H04R1/406 ,  H04R2201/403 ,  H04R2430/23

    Abstract: Audio acquisition systems and methods to determine a direction of arrival of an audio signal are disclosed. In an embodiment, an apparatus includes a continuous sampling stage configured to receive audio information and to generate one or more correlations from the received audio information, and a processing stage configured to receive the one or more correlations and to generate direction of arrival information for the audio information. In another embodiment, a method includes generating audio signals from an ambient acoustic environment, and performing beamforming on the generated audio signals. The method further includes calculating signal-to-interference ratios from the beamformed signals, forming correlations between the signal-to-interference ratios and audio sampling angles, selecting at least one correlation based upon predetermined selection criteria, and determining a direction of arrival for the audio signals.

    Abstract translation: 公开了用于确定音频信号的到达方向的音频采集系统和方法。 在一个实施例中，一种装置包括连续采样级，其被配置为接收音频信息并且从所接收的音频信息中产生一个或多个相关性，以及处理级，被配置为接收一个或多个相关性并产生用于 音频信息。 在另一个实施例中，一种方法包括从环境声学环境产生音频信号，以及对所产生的音频信号执行波束形成。 该方法还包括从波束形成的信号计算信号与干扰比，形成信号与干扰比和音频采样角之间的相关性，基于预定的选择标准选择至少一个相关性，以及确定 音频信号

    Photoplethysmographic device and methods therefore
    4.
    发明授权
    Photoplethysmographic device and methods therefore 有权
    因此，Photoplethysmographic设备和方法

    公开(公告)号：US09072439B2

    公开(公告)日：2015-07-07

    申请号：US13884519

    申请日：2012-01-05

    Applicant: Md. Irwan bin Md. Kassim ,  Mohamad Sulhede Bin Samsudin ,  Thet Khine Cho

    Inventor： Md. Irwan bin Md. Kassim ,  Mohamad Sulhede Bin Samsudin ,  Thet Khine Cho

    IPC: A61B5/1455 ,  A61B5/0295 ,  G01N21/31 ,  A61B5/024 ,  A61B5/00

    CPC classification number: A61B5/0295 ,  A61B5/0059 ,  A61B5/02416 ,  A61B5/1455 ,  A61B5/14551 ,  A61B5/6843 ,  A61B5/6898 ,  A61B5/7203 ,  A61B5/7435 ,  A61B2562/0247 ,  A61B2562/227 ,  F04C2270/041 ,  G01N21/3151 ,  G01N2021/3144

    Abstract: An optical measurement device and a method for optical measurement are provided. The device comprises an illumination assembly configured to output light to a surface portion of a user for measurement; a detection assembly configured to detect the output light reflected from said surface portion of the user as a signal; an amplifier module coupled to the detection assembly configured to apply a gain to an AC component of the signal; a microcontroller coupled to the detection assembly configured to assess a DC voltage level of the signal; wherein the microcontroller is configured to control the light output at the illumination assembly based on said assessing the DC voltage level; and further wherein the microcontroller is configured to select a gain value for said applying the gain based on said assessing the DC voltage level. Specific embodiments of the device relate to a photoplethysmograph or pulse oximeter.

    Abstract translation: 提供光学测量装置和光学测量方法。 该装置包括照明组件，其被配置为将光输出到用户的表面部分用于测量; 检测组件，被配置为检测从所述用户的所述表面部分反射的输出光作为信号; 耦合到所述检测组件的放大器模块，被配置为对所述信号的AC分量施加增益; 耦合到所述检测组件的微控制器，被配置为评估所述信号的DC电压电平; 其中所述微控制器被配置为基于所述评估所述DC电压电平来控制所述照明组件处的光输出; 并且其中所述微控制器被配置为基于所述评估所述直流电压电平来选择所述施加所述增益的增益值。 该装置的具体实施例涉及光电容积描记器或脉搏血氧计。

    PHOTOPLETHYSMOGRAPHIC DEVICE AND METHODS THEREFORE
    5.
    发明申请
    PHOTOPLETHYSMOGRAPHIC DEVICE AND METHODS THEREFORE 有权
    光电子装置及其方法

    公开(公告)号：US20130296665A1

    公开(公告)日：2013-11-07

    申请号：US13884519

    申请日：2012-01-05

    Applicant: Md. Irwan bin Md. Kassim ,  Mohamad Sulhede Bin Samsudin ,  Thet Khine Cho

    Inventor： Md. Irwan bin Md. Kassim ,  Mohamad Sulhede Bin Samsudin ,  Thet Khine Cho

    IPC: A61B5/0295

    CPC classification number: A61B5/0295 ,  A61B5/0059 ,  A61B5/02416 ,  A61B5/1455 ,  A61B5/14551 ,  A61B5/6843 ,  A61B5/6898 ,  A61B5/7203 ,  A61B5/7435 ,  A61B2562/0247 ,  A61B2562/227 ,  F04C2270/041 ,  G01N21/3151 ,  G01N2021/3144

    Abstract: An optical measurement device and a method for optical measurement are provided. The device comprises an illumination assembly configured to output light to a surface portion of a user for measurement; a detection assembly configured to detect the output light reflected from said surface portion of the user as a signal; an amplifier module coupled to the detection assembly configured to apply a gain to an AC component of the signal; a microcontroller coupled to the detection assembly configured to assess a DC voltage level of the signal; wherein the microcontroller is configured to control the light output at the illumination assembly based on said assessing the DC voltage level; and further wherein the microcontroller is configured to select a gain value for said applying the gain based on said assessing the DC voltage level. Specific embodiments of the device relate to a photoplethysmograph or pulse oximeter.

    Abstract translation: 提供光学测量装置和光学测量方法。 该装置包括照明组件，其被配置为将光输出到用户的表面部分用于测量; 检测组件，被配置为检测从所述用户的所述表面部分反射的输出光作为信号; 耦合到所述检测组件的放大器模块，被配置为对所述信号的AC分量施加增益; 耦合到所述检测组件的微控制器，被配置为评估所述信号的DC电压电平; 其中所述微控制器被配置为基于所述评估所述DC电压电平来控制所述照明组件处的光输出; 并且其中所述微控制器被配置为基于所述评估所述直流电压电平来选择所述施加所述增益的增益值。 该装置的具体实施例涉及光电容积描记器或脉搏血氧计。

    Adaptive self-calibration of small microphone array by soundfield approximation and frequency domain magnitude equalization
    7.
    发明授权
    Adaptive self-calibration of small microphone array by soundfield approximation and frequency domain magnitude equalization 有权
    通过声场近似和频域幅度均衡对小麦克风阵列进行自适应自校准

    公开(公告)号：US09241228B2

    公开(公告)日：2016-01-19

    申请号：US13339826

    申请日：2011-12-29

    Applicant: Samuel Samsudin Ng ,  Muralidhar Karthik ,  Sapna George

    Inventor： Samuel Samsudin Ng ,  Muralidhar Karthik ,  Sapna George

    IPC: H04R3/00 ,  H04R25/00 ,  H04R29/00

    CPC classification number: H04R29/006 ,  H04R3/005

    Abstract: Methods and apparatus for self-calibration of small-microphone arrays are described. In one embodiment, self-calibration is based upon a mathematical approximation for which a detected response by one microphone should approximately equal a combined response from plural microphones in the array. In a second embodiment, self-calibration is based upon matching gains in each of a plurality of Bark frequency bands, and applying the matched gains to frequency domain microphone signals such that the magnitude response of all the microphones in the array approximates an average magnitude response for the array. The methods and apparatus may be implemented in hearing aids or small audio devices and used to mitigate adverse aging and mechanical effects on acoustic performance of small-microphone arrays in these systems.

    Abstract translation: 描述了用于小麦克风阵列的自校准的方法和装置。 在一个实施例中，自校准基于一个数学近似，一个麦克风的检测到的响应应近似等于阵列中多个麦克风的组合响应。 在第二实施例中，自校准基于多个Bark频带中的每一个中的匹配增益，并将匹配增益应用于频域麦克风信号，使得阵列中的所有麦克风的幅度响应近似于平均幅度响应 为阵列。 该方法和装置可以在助听器或小型音频装置中实现，并且用于减轻这些系统中小麦克风阵列的声学性能的不利老化和机械效应。

    SYSTEM AND METHOD FOR EFFICIENT SOUND PRODUCTION USING DIRECTIONAL ENHANCEMENT
    9.
    发明申请
    SYSTEM AND METHOD FOR EFFICIENT SOUND PRODUCTION USING DIRECTIONAL ENHANCEMENT 有权
    使用方向增强的有效声音生产的系统和方法

    公开(公告)号：US20130044894A1

    公开(公告)日：2013-02-21

    申请号：US13210048

    申请日：2011-08-15

    Applicant: SAMSUDIN ,  SAPNA GEORGE

    Inventor： SAMSUDIN ,  SAPNA GEORGE

    IPC: H04R3/00

    CPC classification number: H04R3/005 ,  H04R5/027 ,  H04S7/30 ,  H04S2400/15 ,  H04S2420/07

    Abstract: A system and method for generating virtual microphone signals having a particular number and configuration for channel playback from an intermediate set of signals that were recorded in an initial format that is different from the channel playback format. In one embodiment, an initial set of intermediate are Bark-banded such that each intermediate signal may lead to a corresponding power spectral density (PSD) signal representative of the initial intermediate signal. Further, one may generate cross-correlations signals for each pair of intermediate signals. Next, from the PSDs and cross correlations, one may more efficiently calculate corresponding channel signals to be used for playback on respective channel speakers. Thus, the PSDs of each channel signal may be generated at chosen angles (as well as other design factors). Further, each channel signal may also be further modified with a corresponding cancellation signal that further enhances the resultant signal in each channel.

    Abstract translation: 一种用于生成具有特定数量和配置的虚拟麦克风信号的系统和方法，用于从以信道播放格式不同的初始格式记录的中间信号集合进行频道播放。 在一个实施例中，初始中间集合是Bark带状的，使得每个中间信号可以导致表示初始中间信号的对应的功率谱密度（PSD）信号。 此外，可以为每对中间信号产生互相关信号。 接下来，从PSD和互相关，可以更有效地计算要用于在相应的频道扬声器上重放的相应的频道信号。 因此，每个通道信号的PSD可以以选定的角度（以及其他设计因素）产生。 此外，每个信道信号还可以用相应的消除信号进一步修改，进一步增强每个信道中的合成信号。

    System and method for efficient sound production using directional enhancement
    10.
    发明授权
    System and method for efficient sound production using directional enhancement 有权
    使用方向增强的高效声音制作系统和方法

    公开(公告)号：US08873762B2

    公开(公告)日：2014-10-28

    申请号：US13210048

    申请日：2011-08-15

    Applicant: Samsudin ,  Sapna George

    Inventor： Samsudin ,  Sapna George

    IPC: H04R5/00 ,  H04S7/00 ,  H04R3/00 ,  H04R5/027

    CPC classification number: H04R3/005 ,  H04R5/027 ,  H04S7/30 ,  H04S2400/15 ,  H04S2420/07

    Abstract: A system and method for generating virtual microphone signals having a particular number and configuration for channel playback from an intermediate set of signals that were recorded in an initial format that is different from the channel playback format. In one embodiment, an initial set of intermediate are Bark-banded such that each intermediate signal may lead to a corresponding power spectral density (PSD) signal representative of the initial intermediate signal. Further, one may generate cross-correlations signals for each pair of intermediate signals. Next, from the PSDs and cross correlations, one may more efficiently calculate corresponding channel signals to be used for playback on respective channel speakers. Thus, the PSDs of each channel signal may be generated at chosen angles (as well as other design factors). Further, each channel signal may also be further modified with a corresponding cancellation signal that further enhances the resultant signal in each channel.

    Abstract translation: 一种用于生成具有特定数量和配置的虚拟麦克风信号的系统和方法，用于从以信道播放格式不同的初始格式记录的中间信号集合进行频道播放。 在一个实施例中，初始中间集合是Bark带状的，使得每个中间信号可以导致表示初始中间信号的对应的功率谱密度（PSD）信号。 此外，可以为每对中间信号产生互相关信号。 接下来，从PSD和互相关，可以更有效地计算要用于在相应的频道扬声器上重放的相应的频道信号。 因此，每个通道信号的PSD可以以选定的角度（以及其他设计因素）产生。 此外，每个信道信号还可以用相应的消除信号进一步修改，进一步增强每个信道中的合成信号。

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