US 10,332,502 B2 · Noise reducing device, noise reducing method, noise reducing program, and noise reducing audio outputting device

Abstract

A noise reducing device includes: an acoustic-to-electric conversion section for collecting noise and outputting an analog noise signal; an analog-to-digital conversion section for converting the analog noise signal into a digital noise signal; and a digital processing section for generating a digital noise reducing signal on a basis of the digital noise signal and a desired parameter. The device further includes: a retaining section for retaining a plurality of parameters corresponding to a plurality of kinds of noise characteristics; a setting section for setting one of the plurality of parameters as the desired parameter of the digital processing section; a digital-to-analog conversion section for converting the digital noise reducing signal into an analog noise reducing signal; and an electric-to-acoustic conversion section for outputting noise reducing sound on a basis of the analog noise reducing signal.

Claims16

Dependent claims

A method for ambient noise canceling performed by digital noise canceling circuitry coupled with ambient noise analysis performed by digital processing circuitry in at least one earpiece of a personal noise canceling device, the method comprising:

down-sampling digital data representing ambient sounds detected by a microphone disposed on a portion of the personal noise canceling device to derive a down-sampled form of the digital data as side-chain data for the ambient noise analysis;
operating an interface of the personal noise canceling device that couples the digital processing circuitry to a bus, to which the digital noise canceling circuitry is also coupled, to transmit the down-sampled form of the digital data as subject data;
and
operating the digital processing circuitry to employ the subject data as an input to the ambient noise analysis, the ambient noise analysis extracting and analyzing frequency components of the subject data, the ambient noise analysis being performed in a side signal chain that is separate from a main signal chain of the personal noise canceling device where the digital data is processed based on the ambient noise analysis.

1 more element

An apparatus, comprising:

signal processing circuitry, the signal processing circuitry including:
digital noise canceling circuitry;
an ADC (Analog to Digital Converter) including a primary output which outputs to the digital noise canceling circuitry digital data representing ambient sounds detected by a microphone, the microphone being one of a feedback microphone and a feedforward microphone;
and
an interface configured to couple digital processing circuitry performing ambient noise analysis to a bus to which the digital noise canceling circuitry is also coupled, the interface being configured to enable subject data to be transmitted through the bus to be employed by the digital processing circuitry as an input to the ambient noise analysis, the subject data being derived from the digital data by at least down-sampling the digital data as side-chain data for the ambient noise analysis, the ambient noise analysis extracting and analyzing frequency components of the subject data, the ambient noise analysis being performed in a side signal chain that is separate from a main signal chain of the apparatus where the digital data is processed based on the ambient noise analysis.

2 more elements

Dependencies are inferred from the claim text.

Noise reducing device, noise reducing method, noise reducing program, and noise reducing audio outputting device

Life of this patent

Noise reducing device, noise reducing method, noise reducing program, and noise reducing audio outputting device

Life of this patent

Abstract

Claims16