公开(公告)号：US08923540B2

公开(公告)日：2014-12-30

申请号：US13924341

申请日：2013-06-21

Applicant: Oticon A/S

Inventor： Jesper Bünsow Boldt ,  Thomas Bo Elmedyb

IPC: H04R25/00

CPC classification number: H04R25/453 ,  H04R25/505 ,  H04R25/552 ,  H04R25/554 ,  H04R2430/03 ,  Y10T29/49005

Abstract: A hearing aid system may include an ear-mould for a child, an output transducer, and an electrical feedback path. A forward path includes a signal processor that modifies an electrical input signal to a specific hearing profile over a predefined frequency range which includes a number of frequency bands. Maximum forward gain values IGmax for each band are stored in a memory, restricting loop gain to a predetermined value in each band. The hearing aid system further includes a relatively slow online feedback manager unit configured to, with a predefined update frequency, identify current feedback gain in each frequency band, and to subsequently adapt the maximum forward gain values IGmax in each of the frequency bands in accordance with a predefined scheme. The feedback manager unit is thus reduces the risk of howling by decreasing the maximum forward gain values IGmax in said ear-mould for a child.

Abstract translation: 助听器系统可以包括用于儿童的耳模，输出换能器和电反馈路径。 前向路径包括信号处理器，该信号处理器在包括多个频带的预定频率范围内修改到特定听力轮廓的电输入信号。 每个频带的最大正向增益值IGmax存储在存储器中，将环路增益限制在每个频带中的预定值。 助听器系统还包括相对较慢的在线反馈管理器单元，其被配置为以预定的更新频率识别每个频带中的当前反馈增益，并且随后根据以下方式调整每个频带中的最大正向增益值IGmax 一个预定义的方案。 因此，反馈管理器单元通过降低儿童的所述耳模中的最大前进增益值IGmax而降低啸叫的风险。

公开(公告)号：US09338562B2

公开(公告)日：2016-05-10

申请号：US14315115

申请日：2014-06-25

Applicant: Oticon A/S

Inventor： Thomas Bo Elmedyb ,  Johan Hellgren

IPC: H04R25/00 ,  H04R3/00

CPC classification number: H04R25/453 ,  H04R3/002

Abstract: A listening device includes an input transducer, an output transducer, a signal processor, and a feedback cancellation system for estimating acoustic feedback. The feedback cancellation system includes an adaptive FBC filter arranged in parallel to the forward path, an adaptive whitening filter, and a howl detection unit that performs howl detection based on an output of the adaptive whitening filter. The adaptive FBC filter includes a variable FBC filter part and an FBC update algorithm part for updating the variable FBC filter part, the FBC update algorithm part receiving first and second FBC algorithm input signals influenced by the electrical input and the electrical output signals. Further, the feedback cancellation system receives an electrical update signal essentially consisting of the direct part of the electrical input signal and coefficients of the adaptive whitening filter are based on the electrical update signal.

Abstract translation: 听音装置包括输入换能器，输出换能器，信号处理器和用于估计声反馈的反馈消除系统。 反馈消除系统包括与前向路径平行布置的自适应FBC滤波器，自适应白化滤波器和基于自适应白化滤波器的输出执行嚎叫检测的嚎叫检测单元。 自适应FBC滤波器包括可变FBC滤波器部分和用于更新变量FBC滤波器部分的FBC更新算法部分，FBC更新算法部分接收受电输入和电输出信号影响的第一和第二FBC算法输入信号。 此外，反馈消除系统接收基本上由电输入信号的直接部分组成的电更新信号，并且自适应白化滤波器的系数基于电更新信号。