Anr with adaptive gain
Номер патента: EP2425421A1
Опубликовано: 07-03-2012
Автор(ы): Daniel M. Gauger, Marcel Joho, Ricardo F. Carreras, Steven H. Isabelle
Принадлежит: Bose Corp
Опубликовано: 07-03-2012
Автор(ы): Daniel M. Gauger, Marcel Joho, Ricardo F. Carreras, Steven H. Isabelle
Принадлежит: Bose Corp
Реферат: An ANR circuit, possibly of a personal ANR device, monitors a sound level of environmental sounds detected by a microphone external to an earpiece in which the ANR circuit is providing feedback-based ANR, and increases or decreases the degree of feedback-based ANR provided in response to the external microphone detecting a higher or lower sound level, respectively. Increasing and decreasing the degree of feedback-based ANR provided may be carried out by changing a variable loop gain of the ANR circuit and/or a range of frequencies of environmental sounds attenuated by the feedback-based ANR. An ANR circuit, possibly of a personal ANR device, reduces the degree of feedforward-based ANR that it provides in response to receiving an indication of the operation of a manually-operable control. The reduction of degree of feedforward-based ANR may be effected by turning off or otherwise deactivating the provision of feedforward-based ANR, reducing a range of frequencies of environmental noise sounds attenuated by the feedforward-based ANR to provide less attenuation of sounds detected by a feedforward microphone that are in a range of frequencies deemed to be those of human speech, and/or creating a notch in the range of frequencies of environmental noise sounds attenuated by the feedforward-based ANR to provide less attenuation of sounds detected by the feedforward microphone that are in a range of frequencies deemed to be those of human speech.
Anr with adaptive gain
Номер патента: HK1169883A1. Автор: Daniel M Gauger,Steven H Isabelle,Marcel Joho,Ricardo F Carreras. Владелец: Bose Corp. Дата публикации: 2013-02-08.