JP6828804B2 - 収音装置および収音方法 - Google Patents
収音装置および収音方法 Download PDFInfo
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- JP6828804B2 JP6828804B2 JP2019506897A JP2019506897A JP6828804B2 JP 6828804 B2 JP6828804 B2 JP 6828804B2 JP 2019506897 A JP2019506897 A JP 2019506897A JP 2019506897 A JP2019506897 A JP 2019506897A JP 6828804 B2 JP6828804 B2 JP 6828804B2
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- 238000000034 method Methods 0.000 title claims description 14
- 238000012545 processing Methods 0.000 claims description 29
- 239000011358 absorbing material Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 description 37
- 238000010586 diagram Methods 0.000 description 22
- 230000007423 decrease Effects 0.000 description 11
- 238000012935 Averaging Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000010365 information processing Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/342—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
- H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- General Health & Medical Sciences (AREA)
- Circuit For Audible Band Transducer (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
図1は、第1実施形態に係る収音装置1の構成を示す概略図である。図1においては、収音に係る主構成を記載して、その他の構成は記載していない。収音装置1は、円筒形状の筐体50と、マイク10と、を備えている。
次に、図10は、第2実施形態に係る収音装置1Aの構成を示す概略図である。図10においても、収音に係る主構成を記載して、その他の構成は記載していない。収音装置1Aは、2つのマイク10Aおよびマイク10Bを備えている。
10,10A,10B…マイク
15…ゲイン調整部
17…ゲイン計算部
19…I/F
50…筐体
50A…音響障害物
55…ディスプレイ
70…机上
75…吸音材
171A,171B…フィルタ部
172A,172B…絶対値計算部
173A,173B…平均化処理部
174…比較部
175…ゲイン算出部
182A,182B…帯域分割部
183A,183B…立ち上がり時刻検出部
184A,184B…分散計算部
185A,185B…逆数計算部
Claims (13)
- マイクと、
前記マイクに対して所定範囲の収音を阻害する音響障害物と、
前記マイクの収音信号を複数の収音信号に分岐して、前記複数の収音信号のうち少なくともいずれか1つの収音信号に対して、帯域制限処理を行なう、信号処理部と、
前記信号処理部で前記帯域制限処理がされた後の収音信号を含む、前記複数の収音信号の特徴量を比較し、該特徴量の比較結果に応じて前記マイクのゲイン制御を行なう、ゲイン制御部と、
を備えた収音装置。 - 前記帯域制限処理は、低域制限処理を含む、
請求項1に記載の収音装置。 - 前記収音信号は、前記所定範囲に属する音源の音が含まれる場合に、前記音響障害物により前記特徴量が変化する、
請求項1または2に記載の収音装置。 - 前記特徴量は、信号レベルを含む、
請求項1乃至請求項3のいずれかに記載の収音装置。 - 前記特徴量は、異なる周波数における立ち上がり時刻の分散を含む、
請求項1乃至請求項3のいずれかに記載の収音装置。 - 前記ゲイン制御部は、複数の収音信号の特徴量の差または比が所定値以上となる場合に、入力レベルに対する出力レベルを低下させる、
請求項1乃至請求項5のいずれかに記載の収音装置。 - 前記ゲイン制御部は、前記複数の収音信号の特徴量の差または比の変化に応じて、入力レベルに対する出力レベルを変化させる、
請求項1乃至請求項6のいずれかに記載の収音装置。 - 前記音響障害物は、円筒形状の筐体からなる、
請求項1乃至請求項7のいずれかに記載の収音装置。 - 前記音響障害物は、直方体形状の筐体からなる、
請求項1乃至請求項7のいずれかに記載の収音装置。 - 前記所定範囲は、該収音装置が設置された設置面の水平方向に対して所定角度以下の範囲である、
請求項1乃至請求項9のいずれかに記載の収音装置。 - 前記所定範囲は、該収音装置が設置された設置面の水平方向に対して16度以下の範囲である、
請求項10に記載の収音装置。 - 前記音響障害物の近傍に配置された吸音材、
をさらに備えた請求項1乃至請求項11のいずれかに記載の収音装置。 - 音響障害物によって所定範囲の収音が阻害されるマイクの収音信号を複数の収音信号に分岐して、前記複数の収音信号のうち少なくともいずれか1つの収音信号に対して、帯域制限処理を行ない、
前記帯域制限処理がされた後の収音信号を含む、前記複数の収音信号の特徴量を比較し、該特徴量の比較結果に応じて前記マイクのゲイン制御を行なう、
収音方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2017/012070 WO2018173266A1 (ja) | 2017-03-24 | 2017-03-24 | 収音装置および収音方法 |
Related Child Applications (1)
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JP2020139755A Division JP7040568B2 (ja) | 2020-08-21 | 2020-08-21 | 収音装置および収音方法 |
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JPWO2018173266A1 JPWO2018173266A1 (ja) | 2020-01-23 |
JP6828804B2 true JP6828804B2 (ja) | 2021-02-10 |
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Country Status (5)
Country | Link |
---|---|
US (2) | US11197091B2 (ja) |
EP (1) | EP3606091A4 (ja) |
JP (1) | JP6828804B2 (ja) |
CN (1) | CN110447237B (ja) |
WO (1) | WO2018173266A1 (ja) |
Families Citing this family (1)
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CN113973257A (zh) * | 2020-07-23 | 2022-01-25 | 阿里巴巴集团控股有限公司 | 一种拾音装置 |
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-
2017
- 2017-03-24 EP EP17901745.4A patent/EP3606091A4/en active Pending
- 2017-03-24 WO PCT/JP2017/012070 patent/WO2018173266A1/ja active Application Filing
- 2017-03-24 CN CN201780088836.3A patent/CN110447237B/zh active Active
- 2017-03-24 JP JP2019506897A patent/JP6828804B2/ja active Active
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2019
- 2019-09-20 US US16/576,994 patent/US11197091B2/en active Active
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2021
- 2021-11-01 US US17/515,916 patent/US11758322B2/en active Active
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Publication number | Publication date |
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EP3606091A1 (en) | 2020-02-05 |
US20200015003A1 (en) | 2020-01-09 |
JPWO2018173266A1 (ja) | 2020-01-23 |
EP3606091A4 (en) | 2020-11-18 |
CN110447237A (zh) | 2019-11-12 |
US11758322B2 (en) | 2023-09-12 |
WO2018173266A1 (ja) | 2018-09-27 |
US11197091B2 (en) | 2021-12-07 |
CN110447237B (zh) | 2022-04-15 |
US20220060816A1 (en) | 2022-02-24 |
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