JP2016038416A - 信号処理装置、プログラム、レンジフード装置 - Google Patents
信号処理装置、プログラム、レンジフード装置 Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2042—Devices for removing cooking fumes structurally associated with a cooking range e.g. downdraft
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17817—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the error signals, i.e. secondary path
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17819—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the reference signals, e.g. to prevent howling
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
- G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17855—Methods, e.g. algorithms; Devices for improving speed or power requirements
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/105—Appliances, e.g. washing machines or dishwashers
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3016—Control strategies, e.g. energy minimization or intensity measurements
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3026—Feedback
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3027—Feedforward
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3028—Filtering, e.g. Kalman filters or special analogue or digital filters
Abstract
Description
本実施形態の消音装置1(能動騒音制御装置)の構成を図1に示す。消音装置1は、レンジフード装置2に組み合わせて用いられる。
この場合、信号処理装置12は、消音対象となる騒音の周波数特性にピークあるいはディップがある場合でも、周波数ビン毎にフィルタ係数W(W1〜Wn)を設定することによって、騒音の周波数特性に応じたキャンセル音を生成することができる。したがって、信号処理装置12は、消音対象となる騒音の周波数特性にピークあるいはディップがある場合でも、消音性能を維持することができる。
11 音入出力装置
12 信号処理装置
111 参照マイクロホン(第1の音入力器)
112 誤差マイクロホン(第2の音入力器)
113 スピーカ(音出力器)
133 第1信号変換部
134 第2信号変換部
135 係数更新部
136 キャンセル信号生成部
136a 消音フィルタ
137 パラメータ調整部
2 レンジフード装置
21 ダクト(通気路)
22 ファン(通風装置)
Claims (8)
- 騒音源から発せられた騒音が伝播する空間に設けられて前記騒音を集音する第1音入力器と、キャンセル信号を入力されて前記騒音を打ち消すキャンセル音を前記空間に発する音出力器と、前記空間において前記騒音と前記キャンセル音との合成音を集音する第2音入力器とを備える音入出力装置に組み合わせて用いられて、
フィルタ係数を設定される消音フィルタを具備して、前記第1音入力器の出力に基づいて生成された第1信号を入力されて前記キャンセル信号を出力するキャンセル信号生成部と、
前記音出力器から前記第2音入力器に至る音響経路の伝達関数に基づいて前記第1信号を補正した第2信号を出力する第1信号変換部と、
前記第2信号、前記第2音入力器の出力から生成された第3信号、および前記フィルタ係数を繰り返し算出する処理における前記フィルタ係数の補正量の大きさに関係する更新パラメータに基づいて前記フィルタ係数を算出する係数更新部と、
前記第1音入力器の出力変動に応じて前記更新パラメータを調整するパラメータ調整部と
を備えることを特徴とする信号処理装置。 - 前記係数更新部による前記算出処理の収束時間は、前記更新パラメータが小さいほど長くなり、
前記パラメータ調整部は、前記第1音入力器の出力の信号強度が増加した場合に前記更新パラメータを減少させ、前記第1音入力器の出力の信号強度が低下した場合に前記更新パラメータを増大させる
ことを特徴とする請求項1記載の信号処理装置。 - 前記第2音入力器の出力から周波数領域の前記第3信号を生成する第2信号変換部をさらに備えて、
前記第1信号変換部は、周波数領域の前記第2信号を出力し、
前記消音フィルタは、所定の周波数帯域を複数の周波数ビンに分割して、前記周波数ビン毎に前記フィルタ係数を設定されており、
前記係数更新部は、周波数領域において前記周波数ビン毎の前記フィルタ係数の演算処理を行い、
前記パラメータ調整部は、前記複数の周波数ビンのそれぞれに対応する前記更新パラメータを調整する
ことを特徴とする請求項1または2記載の信号処理装置。 - 前記パラメータ調整部は、前記第1音入力器の出力変動として前記第2信号の変動を用い、前記第2信号の変動に基づいて前記更新パラメータを調整することを特徴とする請求項3記載の信号処理装置。
- 前記複数の周波数ビンのそれぞれに、所望のサンプル数の前記第2信号のそれぞれにおける前記周波数ビン毎の信号強度の極大値を設定する統計処理によって第4信号を生成する統計部と、
前記第2信号のサンプル数を第1サンプル数とした場合に前記統計処理によって生成される信号の信号強度と、前記第2信号のサンプル数を前記第1サンプル数より多い第2サンプル数とした場合に前記統計処理によって生成される信号の信号強度との比に基づいて、前記第4信号を補正する補正部とを備え、
前記パラメータ調整部は、前記補正部によって補正された前記第4信号を用いて前記更新パラメータを導出する
ことを特徴とする請求項3または4記載の信号処理装置。 - 前記パラメータ調整部は、忘却係数を用いることによって、前記更新パラメータを導出することを特徴とする請求項1乃至5いずれか記載の信号処理装置。
- コンピュータを、請求項1乃至6いずれか記載の信号処理装置として機能させることを特徴とするプログラム。
- 中空状の通気路と、前記通気路の一端から他端に向かう気流を発生させる送風装置と、前記通気路内に設けられて前記送風装置が発する騒音を集音する第1の音入力器と、キャンセル信号を入力されて前記騒音を打ち消すキャンセル音を前記通気路内に発する音出力器と、前記通気路内において前記騒音と前記キャンセル音との合成音を集音する第2の音入力器と、請求項1乃至6いずれか記載の信号処理装置とを備え、前記通気路の前記一端から前記他端に向かって、前記第2の音入力器、前記音出力器、前記第1の音入力器の順に配置されることを特徴とするレンジフード装置。
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US15/501,345 US10229666B2 (en) | 2014-08-05 | 2015-07-09 | Signal processing device, program, and range hood device |
PCT/JP2015/003476 WO2016021114A1 (ja) | 2014-08-05 | 2015-07-09 | 信号処理装置、プログラム、レンジフード装置 |
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US10199033B1 (en) * | 2016-02-09 | 2019-02-05 | Mitsubishi Electric Corporation | Active noise control apparatus |
CN106642262A (zh) * | 2016-08-20 | 2017-05-10 | 中声科技(北京)有限公司 | 一种主动消除噪音的油烟机 |
US10984778B2 (en) | 2019-07-19 | 2021-04-20 | Cirrus Logic, Inc. | Frequency domain adaptation with dynamic step size adjustment based on analysis of statistic of adaptive filter coefficient movement |
US10789933B1 (en) * | 2019-07-19 | 2020-09-29 | Cirrus Logic, Inc. | Frequency domain coefficient-based dynamic adaptation control of adaptive filter |
US11217222B2 (en) * | 2019-07-19 | 2022-01-04 | Cirrus Logic, Inc. | Input signal-based frequency domain adaptive filter stability control |
CN111899712B (zh) * | 2020-08-13 | 2024-03-22 | 珠海格力电器股份有限公司 | 抽油烟机的主动降噪装置及方法 |
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US20170229111A1 (en) | 2017-08-10 |
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JP6384784B2 (ja) | 2018-09-05 |
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