-
公开(公告)号：US09813812B2
公开(公告)日：2017-11-07
申请号：US14569182
申请日：2014-12-12
Applicant: Analog Devices Global
CPC classification number: H04R3/007 , H03G9/005 , H03G9/025 , H04R29/001 , H04R2430/03
Abstract: The present application relates in one aspect to a method of controlling diaphragm excursion of an electrodynamic loudspeaker. The method comprises dividing the audio input signal into at least a low-frequency band signal and a high-frequency band signal by a band-splitting network and applying the low-frequency band signal to a diaphragm excursion estimator. The instantaneous diaphragm excursion is determined based on the low-frequency band signal. The determined instantaneous diaphragm excursion is compared with an excursion limit criterion. The low-frequency band signal is limited based on a result of the comparison between the instantaneous diaphragm excursion and the excursion limit criterion to produce a limited low-frequency band signal which is combined with the high-frequency band signal to produce an excursion limited audio signal.
-
2.发明授权公开(公告)号：US09531433B2
公开(公告)日：2016-12-27
申请号：US14175480
申请日：2014-02-07
Applicant: Analog Devices Global
Inventor： Kim Spetzler Berthelsen , Robert Adams , Kasper Strange
Abstract: A feedback cancellation assembly for an electroacoustic communication apparatus may include a signal transmission path for generation and emission of an outgoing sound signal to an external environment through an electrodynamic loudspeaker and a signal reception path comprising a microphone for generation of a microphone input signal corresponding to sound received from the external environment. The signal reception path may generate a digital microphone signal. The outgoing sound signal may be acoustically coupled to the microphone. An electronic feedback cancellation path may be coupled between a tapping node and a summing node to produce a feedback cancellation signal to the summing node.
Abstract translation: 用于电声通信设备的反馈消除组件可以包括用于通过电动扬声器产生和发射到外部环境的输出声音信号的信号传输路径，以及包括用于产生对应于声音的麦克风输入信号的麦克风的信号接收路径 从外部环境收到。 信号接收路径可以产生数字麦克风信号。 输出声音信号可以声学耦合到麦克风。 电子反馈消除路径可以耦合在轻敲节点和求和节点之间以产生到求和节点的反馈消除信号。
-
3.发明授权公开(公告)号：US09525939B2
公开(公告)日：2016-12-20
申请号：US14511955
申请日：2014-10-10
Applicant: ANALOG DEVICES GLOBAL
Inventor： Kim Spetzler Berthelsen , Kasper Strange
Abstract: The present invention relates in one aspect to a voice coil temperature protector for electrodynamic loudspeakers. The voice coil temperature protector comprises an audio signal input for receipt of an audio signal supplied by an audio signal source and a probe signal source for generation of a low-frequency probe signal. A signal combiner is configured to combine the audio signal with the low-frequency probe signal to provide a composite loudspeaker drive signal comprising an audio signal component and a probe signal component. The voice coil temperature protector comprises a current detector configured for detecting a level of a probe current component flowing through the voice coil in response to the composite loudspeaker drive signal and a current comparator which is configured to comparing the detected level of the probe current component with a predetermined probe current threshold. The predetermined probe current threshold corresponds to a predetermined voice coil temperature via a known temperature dependency of a voice coil resistance. The voice coil temperature protector further comprises a signal controller configured for attenuating a level of the audio signal in response to the probe current component falls below the predetermined probe current threshold.
Abstract translation: 本发明在一个方面涉及一种用于电动扬声器的音圈温度保护器。 音圈温度保护器包括用于接收由音频信号源提供的音频信号的音频信号输入端和用于产生低频探测信号的探测信号源。 信号组合器被配置为将音频信号与低频探测信号组合以提供包括音频信号分量和探测信号分量的复合扬声器驱动信号。 音圈温度保护器包括电流检测器，其被配置为响应于复合扬声器驱动信号检测流过音圈的探头电流分量的电平;以及电流比较器，其被配置为将探测电流分量的检测电平与 预定的探针电流阈值。 预定的探针电流阈值通过音圈电阻的已知温度依赖性对应于预定的音圈温度。 音圈温度保护器还包括信号控制器，该信号控制器被配置为响应于探头电流分量而降低到低于预定探针电流阈值的音频信号的电平。
-
公开(公告)号：US09980068B2
公开(公告)日：2018-05-22
申请号：US14073324
申请日：2013-11-06
Applicant: Analog Devices Global
Inventor： Kim Spetzler Berthelsen , Kasper Strange
CPC classification number: H04R29/001 , H03F1/52 , H03F2200/462 , H03F2200/471 , H03G7/08 , H03G9/005 , H03G11/04 , H04R1/00 , H04R3/002 , H04R3/007 , H04R29/00 , H04R29/003
Abstract: A method of estimating diaphragm excursion of an electrodynamic loudspeaker may be performed using audio signals. An audio output signal may be applied to a voice coil of the electrodynamic loudspeaker through an output amplifier to produce sound. A detected voice coil current and a determined voice coil voltage may be applied to a linear adaptive digital loudspeaker model that has a plurality of adaptive loudspeaker parameters. The parameter values of the adaptive loudspeaker parameters may be computed based on the linear adaptive digital loudspeaker model and applied to a non-linear state-space model of the electrodynamic loudspeaker. For the non-linear state-space model, a predetermined non-linear function may be applied to at least one of the plurality of received parameter values to compute at least one non-linearity compensated parameter value of the adaptive loudspeaker parameters, to determine an instantaneous excursion of the diaphragm.
-
-
-
Search Results
4
records
(took 0.014 seconds)
