US 9,805,709 B2 · Howling suppression method and device applied to an ANR earphone

Abstract

The present invention discloses a howling suppression method and device applied to an ANR earphone. The method comprises: collecting signals by using a first microphone and a second microphone; wherein the first microphone is arranged in a position outside an auditory meatus when said ANR earphone is worn, and the second microphone is arranged in a position inside the auditory meatus when the ANR earphone is worn; according to a relation between signals collected by the first microphone and the second microphone, judging whether the current state of said ANR earphone is a state unable to produce a howling or a state able to produce a howling; and when the current state of said ANR earphone is a state able to produce a howling, starting processing for preventing howling production. The technical scheme can achieve that the ANR earphone does not produce a howling all the time.

Claims10

Dependent claims

A howling suppression method applied to an Active Noise Reduction (ANR) earphone before howling occurs, comprising:

collecting signals using a first microphone and then a second microphone, wherein the first microphone is arranged in a position outside an auditory meatus when the ANR earphone is worn, and the second microphone is arranged in a position inside the auditory meatus when the ANR earphone is worn;
generating a transfer function that relates the collected signals from the first and second microphones;
using the transfer function, determining whether a current state of the ANR earphone is a state that is able to produce howling;
and
suppressing howling when the current state of the ANR earphone is the state able to produce howling.

2 more elements

A howling suppression device applied to an Active Noise Reduction (ANR) earphone before howling occurs, comprising:

a first microphone configured to fit outside an auditory meatus when the ANR earphone is worn;
a second microphone configured to fit inside the auditory meatus when the ANR earphone is worn;
a state judger configured to generate a transfer function that relates signals firstly collected from the first microphone and then collected from the second microphone and, based on the transfer function, judging whether a current state of the ANR earphone is able to produce howling;
a howling processor for preventing howling when the current state of said the ANR earphone outputted by said state judger is able to produce howling.

1 more element

Dependencies are inferred from the claim text.

Howling suppression method and device applied to an ANR earphone

Life of this patent

Howling suppression method and device applied to an ANR earphone

Life of this patent

Abstract

Claims10