公开(公告)号：US20190028818A1

公开(公告)日：2019-01-24

申请号：US16035903

申请日：2018-07-16

Applicant: RION Co., Ltd.

Inventor： Nobuhiko HIRUMA ,  Masahiro SUNOHARA

IPC: H04R25/00

CPC classification number: H04R25/453 ,  H04R3/02 ,  H04R25/505 ,  H04R2225/41

Abstract: Provided is a hearing aid including a receiver, a microphone, an adaptive filter estimating a feedback transfer function from the receiver to the microphone, a subtractor, a hearing aid processor, a first whitening filter, a second whitening filter having a whitening filter coefficient identical to that of the first whitening filter, a coefficient updater, and a controller controlling the adaptive filter and the first and second whitening filters. The controller updates and saves, as a stabilization coefficient, the coefficient of the adaptive filter in a condition in which the autocorrelation of the first signal is low, determines the presence or absence of a change in the feedback transfer function based on the coefficient of the adaptive filter and the stabilization coefficient, and performs, when it is determined that the feedback transfer function has changed, the control in order that effectiveness of whitening by the first and second whitening filters is reduced as compared to that when it is determined that the feedback transfer function does not change.

公开(公告)号：US20190364361A1

公开(公告)日：2019-11-28

申请号：US16418579

申请日：2019-05-21

Applicant: NATIONAL UNIVERSITY CORPORATION, IWATE UNIVERSITY ,  RION Co., Ltd.

Inventor： Kiyoshi NISHIYAMA ,  Masahiro SUNOHARA ,  Nobuhiko HIRUMA ,  Chiho HARUTA ,  Makoto TATENO

IPC: H04R3/04 ,  G10L21/0232

Abstract: A system identification device for performing fast real-time identification for a system from input/output data includes a filter robust to disturbance, by setting the maximum energy gain from the disturbance to a filter error, as an evaluation criterion, smaller than a given upper limit. The filter estimates a state estimation value of a state of the system.

公开(公告)号：US20190222945A1

公开(公告)日：2019-07-18

申请号：US16245120

申请日：2019-01-10

Applicant: RION Co., Ltd.

Inventor： Nobuhiko HIRUMA ,  Kazuteru NISHIYAMA

IPC: H04R25/00 ,  H04M1/725

CPC classification number: H04R25/554 ,  H04M1/7253 ,  H04M1/72591 ,  H04R25/602 ,  H04R25/70 ,  H04R2225/55 ,  H04R2225/61

Abstract: A hearing aid provided which has: a battery; a control means which controls a function of the hearing aid, including a wireless communication; a power supply switch which switches between supply and block of power from the battery to the control means; and a magnetic switch connected to the control means, wherein: the control means proceed to a normal operation via a start-up process when power is supplied from the battery due to the power supply switch; and if the magnetic switch is on during the start-up process, the control means switches a wireless communication setting before proceeding to the normal operation.