WO2002062100A1 - Microphone system excellent in directivity - Google Patents
Microphone system excellent in directivity Download PDFInfo
- Publication number
- WO2002062100A1 WO2002062100A1 PCT/JP2001/000668 JP0100668W WO02062100A1 WO 2002062100 A1 WO2002062100 A1 WO 2002062100A1 JP 0100668 W JP0100668 W JP 0100668W WO 02062100 A1 WO02062100 A1 WO 02062100A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sound
- microphone
- guide tube
- microphone system
- surface material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/04—Microphones
Definitions
- the present invention relates to an inexpensive and highly directional microphone system that can be installed inside a case, a housing, a stuffed toy, a doll, and the like (collectively referred to as “surface material”).
- a microphone system with high directivity that can be mass-produced inexpensively by adding a simple structure to human voices uttered face-to-face when a doll, etc., in contact with a human being has a conversation.
- a microphone system with high directivity that can be mass-produced inexpensively by adding a simple structure to human voices uttered face-to-face when a doll, etc., in contact with a human being has a conversation.
- a microphone system with high directivity that can be mass-produced inexpensively by adding a simple structure to human voices uttered face-to-face when a doll, etc., in contact with a human being has a conversation.
- the computer When a human being has a conversation with a doll or the like built in the computer or connected to the computer, the computer accurately recognizes the voice of the human being, analyzes the words, analyzes the sentences, and prepares it in advance. Create and output a response statement according to the program.
- the sound is usually received by pointing the condenser microphone to the sound source such as a doll, that is, the human side (face-to-face side).
- the present invention has been made in view of the above-mentioned state of the art, and has an extremely simple configuration. Therefore, it is possible to efficiently cut off ambient noise despite its low manufacturing cost and mass production. It is an object of the present invention to provide a microphone system capable of receiving a face-to-face voice with good directivity.
- the present invention relates to a microphone system capable of radiating ambient noise and receiving sound emitted from a face-to-face direction with good directivity, comprising: a microphone installed inside a surface material toward a sound generation source; and a microphone.
- a sound guide tube made of a tubular sound reflective material installed inside the surface material so that the direction toward the sound source coincides with the axial direction of the sound source. It provides a microphone system with excellent directivity that is configured to include it.
- the microphone system having excellent directivity according to the first aspect, wherein the microphone is a condenser microphone, and a porous key capable of cutting a predetermined frequency to a free end of the sound guide tube. A cap is attached.
- the sound guide tube and the condenser microphone are integrally formed by a rigid base.
- the fixing part provided on the surface material is fixed to a predetermined position inside the surface material by fixing it to a frame arranged inside the doll.
- FIG. 1 is a longitudinal sectional view of one embodiment of a microphone system having excellent directivity according to the present invention.
- FIG. 2 is an explanatory view showing a state in which the microphone system having excellent directivity shown in FIG. 1 is mounted inside a doll.
- a microphone system 1 having excellent directivity generally includes a microphone 10 which is conventionally known, and a sound source side of the microphone 10, that is, a sound generation side.
- a sound guide tube 20 installed on the side where a human being as a source is located; a porous cap 30 such as a sponge mounted on a free end of the sound guide tube 20; and the sound guide tube 20 and a micro tube.
- a hard base 40 integrally formed with the phone 10.
- a capacitor microphone 10 was used which is relatively inexpensive and can be made compact. This condenser microphone 10 is installed so as to be on the side where a person who is a sound source is present.
- the sound guide tube 20 is made of various hard plastics or a cylindrical tube made of metal such as aluminum or stainless steel, and reaches the position of the condenser microphone 10 while reflecting sound emitted from a human mouth. Let it.
- the sound guide tube 20 is arranged so that its axial direction coincides with the direction of a human mouth which is a sound source.
- the frequency characteristic (: e characteristic) can be changed by appropriately selecting the length of the sound guide tube 20 in the axial direction and the material. As a result, it is possible to narrow down so that only the voice of the target person reaches the condenser microphone 1 °. In other words, there is an effect that it is possible to limit the persons (objects) who want to hear.
- the porous cap 30 attached to the free end of the sound guide tube 20 emphasizes low-frequency components of the input voice that are difficult to distinguish from noise due to harshness. As a result, the accuracy of speech recognition by a computer is improved, and, for example, word decomposition and sentence analysis can be performed accurately.
- the microphone system 1 according to the present invention is mounted in the doll 3, the porous cap 30 has a sound passage opening 3 a of the doll 3 (a thin material different from the skin material of the doll so that sound can be easily passed). It is attached to the back of the surrounding area.
- the hook 3 can be hooked and engaged with the hook strip fastener 4 to be held on the outer skin of the doll 3 in a flexible structure.
- the rigid base 40 is for constructing the condenser microphone 10 and the sound tube 20 as an integral part, and is manufactured as a separate part in the preferred embodiment shown.
- the housing portions of the sound guide tube 20 and the capacitor microphone 10 can be integrally molded as the same plastic or metal as the hard base 40.
- the rigid base 40 is fixed at a predetermined position inside the doll 3 by fixing the mounting portion 40 a provided on the base to a frame arranged inside the doll 3.
- three microphone systems 1 are arranged at equal intervals in the vertical direction of the doll 3.
- a sensor (not shown) can be configured to detect the height of the mouth of the person 5 and select the microphone system 1 having the optimum height.
- the microphone system 1 can be made swingable in a vertical plane with respect to the frame of the doll 3, and the axis of the sound tube 20 can be driven so as to face the mouth of the person 5. .
- the sound emitted from the mouth of the human 5 enters the sound guide tube 20 with good directivity, enters the back while reflecting along the inner wall, and is received by the condenser microphone 10. It is. Sound from other than the direction of the mouth of the human 5, that is, ambient noise, cannot enter the sound guide tube 20, or can enter only a very small amount, and therefore, S / N Despite the simple ratio, it has an extremely large effect.
- the present invention is described as a microphone system built into a surface material, it is of course applicable to various other applications where noise is cut or directivity is required. Include them.
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Toys (AREA)
Abstract
Description
明細書 Specification
指向性に優れたマイクシステム Microphone system with excellent directivity
抟術分野 Surgery field
本発明は、 ケース、 ハウジング、 縫ぐるみ、 人形等 （ 「表面素材」 と総称する） の内部に設置することができる安価且つ指向性に優れた マイクシステムに係り、 特に、 コンピュータ内蔵又はコンビュ一夕に 接檨された人形等と人間との間で会話をさせるような場合に、 対面か ら発せられる人間の音声を簡単な構成の付加によって、 従って、 安価 に大量生産できる指向性の良いマイクシステムに関する。 The present invention relates to an inexpensive and highly directional microphone system that can be installed inside a case, a housing, a stuffed toy, a doll, and the like (collectively referred to as “surface material”). A microphone system with high directivity that can be mass-produced inexpensively by adding a simple structure to human voices uttered face-to-face when a doll, etc., in contact with a human being has a conversation. About.
技術の宜 Technology
コンピュータ内蔵又はコンピュータに接続された人形等と人間との 間で会話をさせるような場合、 コンピュータは、 人間の発した音声を 正確に音声認識し、 単語分解 ·文章解析した上で、 予め用意したプロ グラムに従って応答文を作成し、 出力する。 この場合、 音声の受信は- 通常、 人形等の音声発生源、 すなわち、 人間側 （対面側） にコンデン サマイクロフォンを向けて行うこととなる。 When a human being has a conversation with a doll or the like built in the computer or connected to the computer, the computer accurately recognizes the voice of the human being, analyzes the words, analyzes the sentences, and prepares it in advance. Create and output a response statement according to the program. In this case, the sound is usually received by pointing the condenser microphone to the sound source such as a doll, that is, the human side (face-to-face side).
周囲の雑音をカツ トし人間の発する音声のみを効率よく受信するこ とが、 人間の発した音声を正確に音声認識する上で重要となる。 これ は、 そのまま単語分解 ·文章解析の精度に影響し、 ひいては、 コンビ ユー夕と人間との会話が成り立つか否かを決定付ける要因ともなる。 従来のコンデンサマイクロフォンでは、 例えば、 特開平 7— 2 0 3 5 7 4号のように、 マイクロフォンの前面に、 音響抵抗 r A , 音響コ ンプライアンス c A， イナ一夕ンス mA の組み合せによる音響構造的 高域濾波器を設置することにより、 音声レベルをあまり低下させる事 なく、 低周波高圧空気流によって発生する不快な雑音信号を軽減させ るといった取り組みはなされていた。 また、 音声発生源である人間の 口から比較的離れた状態で音声を受け取るような場合における指向性 改善の工夫もなされてはいたが、 構造が複雑で安価に生産できなかつ たり、 大量生産に向かないものであった。 本発明は、 上述の従来技術の現状に鑑みなされたもので、 極めて 簡単な構成により、 従って、 製造コストが安価で大量生産可能であ るにもかかわらず、 周囲の雑音を効率的にカツ トでき且つ対面から発 せられる音声を指向性良く受信することができるマイクシステムを提 供することを目的とする。 It is important to cut off ambient noise and receive only human voices efficiently in order to accurately recognize human voices. This directly affects the accuracy of word decomposition and sentence analysis, and is a factor that determines whether a conversation between a user and a conversation can be established. Acoustic by a conventional condenser microphone, for example, as in JP-7- 2 0 3 5 7 4 No., in front of the microphone, the combination of the acoustic resistance r A, acoustic compliance c A, Ina Isseki Nsu m A Efforts have been made to reduce the unpleasant noise signals generated by the low-frequency high-pressure airflow without significantly reducing the sound level by installing a structural high-pass filter. In addition, the directivity was improved when the sound was received relatively distant from the human mouth, which is the source of the sound, but the structure was complicated and it could not be produced at low cost, and mass production was not possible. It was not suitable. The present invention has been made in view of the above-mentioned state of the art, and has an extremely simple configuration. Therefore, it is possible to efficiently cut off ambient noise despite its low manufacturing cost and mass production. It is an object of the present invention to provide a microphone system capable of receiving a face-to-face voice with good directivity.
雜昍の間示 昍
本発明は、 周囲の雑音を力ットでき且つ対面から発せられる音声を 指向性良く受信するマイクシステムであって、 音声の発生源に向って 表面素材の内部に設置されるマイクロフオンと、 マイクロフォンの音 声発生源側であって該音声発生源に向う方向がその軸線方向と一致す るように表面素材の内部に設置される筒状の音声反射性材料から作ら れた導音管とを含んで構成された指向性に優れたマイクシステムを提 供する。 The present invention relates to a microphone system capable of radiating ambient noise and receiving sound emitted from a face-to-face direction with good directivity, comprising: a microphone installed inside a surface material toward a sound generation source; and a microphone. A sound guide tube made of a tubular sound reflective material installed inside the surface material so that the direction toward the sound source coincides with the axial direction of the sound source. It provides a microphone system with excellent directivity that is configured to include it.
請求項 2に記載の発明は、 請求項 1に記載の指向性に優れたマイク システムにおいて、 マイクロフォンがコンデンサマイクロフォンであ り、 導音管の自由端に所定周波数をカツトすることができる多孔性キ ャヅプが装着されていることを特徴とする。 According to a second aspect of the present invention, there is provided the microphone system having excellent directivity according to the first aspect, wherein the microphone is a condenser microphone, and a porous key capable of cutting a predetermined frequency to a free end of the sound guide tube. A cap is attached.
請求項 3に記載の発明は、 請求項 1又は 2に記載の指向性に優れた マイクシステムにおいて、 導音管とコンデンサマイクロフオンとが硬 質ベースによって一体的に構築されており、 当該べ一スに設けられた 取付部を人形の内部に配置されたフレームに固定することにより表面 素材内部の所定位置に固定することを特徴とする。 According to a third aspect of the present invention, in the microphone system having excellent directivity according to the first or second aspect, the sound guide tube and the condenser microphone are integrally formed by a rigid base. The fixing part provided on the surface material is fixed to a predetermined position inside the surface material by fixing it to a frame arranged inside the doll.
図而の簡単な説明 Brief description of the figure
第 1図は、 本発明に係る指向性に優れたマイクシステムの一実施例 の縦断面図である。 FIG. 1 is a longitudinal sectional view of one embodiment of a microphone system having excellent directivity according to the present invention.
第 2図は、 第 1図に示された指向性に優れたマイクシステムを人形 の内部に搭載した状態の説明図である。 FIG. 2 is an explanatory view showing a state in which the microphone system having excellent directivity shown in FIG. 1 is mounted inside a doll.
発昍 室施する めの暴 の形熊 以下、 図面を参照して本発明に係る指向性に優れたマイクシステ ムを図示された実施例に基づいて詳細に説明する。 Violent bears for launching rooms Hereinafter, a microphone system having excellent directivity according to the present invention will be described in detail with reference to the drawings based on the illustrated embodiment.
図 1 に示されているように、 本発明に係る指向性に優れたマイクシ ステム 1は、 概略的に、 従来周知のマイクロフォン 1 0と、 マイクロ フォン 1 0の音声発生源側、 すなわち、 音声発生源である人間の居る 側に設置される導音管 2 0と、 導音管 2 0の自由端に装着されるスポ ンジ等の多孔性キヤヅプ 3 0と、 そして、 導音管 2 0とマイクロフォ ン 1 0とを一体的に構築した硬質ベース 4 0とを備えている。 As shown in FIG. 1, a microphone system 1 having excellent directivity according to the present invention generally includes a microphone 10 which is conventionally known, and a sound source side of the microphone 10, that is, a sound generation side. A sound guide tube 20 installed on the side where a human being as a source is located; a porous cap 30 such as a sponge mounted on a free end of the sound guide tube 20; and the sound guide tube 20 and a micro tube. And a hard base 40 integrally formed with the phone 10.
図示された好ましい実施例では、 比較的安価に入手することができ 且つコンパクトなサイズとすることができるコンデンサマイクロフォ ン 1 0を用いた。 このコンデンサマイクロフォン 1 0を音声の発生源 である人間の居る側となるように設置する。 In the preferred embodiment shown, a capacitor microphone 10 was used which is relatively inexpensive and can be made compact. This condenser microphone 10 is installed so as to be on the side where a person who is a sound source is present.
導音管 2 0は、 各種の硬質プラスチック、 あるいは、 アルミニウム、 ステンレス管等の金属製円筒管から作られており、 人間の口から発せ られた音声を反射しながらコンデンサマイクロフォン 1 0の位置まで 到達させる。 導音管 2 0は、 その軸線方向が音声発生源である人間の 口の方向と一致するように配置される。 導音管 2 0の軸方向の長さ、 素材を適宜選択することで、 周波数特性 （： e特性） を変更させること ができる。 これにより、 対象とする人物の音声のみをコンデンサマイ クロフオン 1 ◦に到達させるように絞ることができる。 すなわち、 聞 きたい人物 （対象） を限定することが可能となる効果がある。 The sound guide tube 20 is made of various hard plastics or a cylindrical tube made of metal such as aluminum or stainless steel, and reaches the position of the condenser microphone 10 while reflecting sound emitted from a human mouth. Let it. The sound guide tube 20 is arranged so that its axial direction coincides with the direction of a human mouth which is a sound source. The frequency characteristic (: e characteristic) can be changed by appropriately selecting the length of the sound guide tube 20 in the axial direction and the material. As a result, it is possible to narrow down so that only the voice of the target person reaches the condenser microphone 1 °. In other words, there is an effect that it is possible to limit the persons (objects) who want to hear.
導音管 2 0の自由端に装着される多孔性キャップ 3 0は、 入力され る音声のうち耳障りで雑音と区別し難い低周波数成分を力ットする。 これにより、 コンピュータによる音声認識の精度を向上させ、 例えば、 単語分解 ·文章解析を正確に行えるようにする。 多孔性キャップ 3 0 は、 また、 本発明に係るマイクシステム 1を人形 3内に装着する際、 人形 3の音声通過口 3 a (音声の通過が容易なように人形の表皮材料 とは異なる薄い網状素材が張られている。 ） の周囲裏側に取り付けら れるフック条面ファスナ 4に引っ掛り係合させ、 柔構造で人形 3の 表皮に保持させることができる。 The porous cap 30 attached to the free end of the sound guide tube 20 emphasizes low-frequency components of the input voice that are difficult to distinguish from noise due to harshness. As a result, the accuracy of speech recognition by a computer is improved, and, for example, word decomposition and sentence analysis can be performed accurately. When the microphone system 1 according to the present invention is mounted in the doll 3, the porous cap 30 has a sound passage opening 3 a of the doll 3 (a thin material different from the skin material of the doll so that sound can be easily passed). It is attached to the back of the surrounding area. The hook 3 can be hooked and engaged with the hook strip fastener 4 to be held on the outer skin of the doll 3 in a flexible structure.
硬質ベース 4 0は、 コンデンサマイクロフォン 1 0と導音管 2 0と を一体部品として構築するためのもので、 図示された好ましい実施例 では、 別部品として製造されている。 もちろん、 導音管 2 0及びコン デンサマイクロフオン 1 0のハウジング部分を硬質ベース 4 0と同じ プラスチック、 金属として一体成型することもできる。 硬質ベース 4 0は、 当該ベースに設けられた取付部 4 0 aを人形 3の内部に配置さ れたフレームに固定することにより人形内部の所定位置に固定する。 第 2図に示された好ましい実施例では、 3個のマイクシステム 1を 人形 3の鉛直方向に等間隔で配置している。 図示されないセンサによ り、 人間 5の口の高さを検知し、 最適の高さのマイクシステム 1を選 択するように構成することができる。 あるいは、 マイクシステム 1を 人形 3のフレームに対して垂直面内において揺動可能としておき、 導 音管 2 0の軸線が人間 5の口の方向を向くように駆動させるようにす ることもできる。 The rigid base 40 is for constructing the condenser microphone 10 and the sound tube 20 as an integral part, and is manufactured as a separate part in the preferred embodiment shown. Of course, the housing portions of the sound guide tube 20 and the capacitor microphone 10 can be integrally molded as the same plastic or metal as the hard base 40. The rigid base 40 is fixed at a predetermined position inside the doll 3 by fixing the mounting portion 40 a provided on the base to a frame arranged inside the doll 3. In the preferred embodiment shown in FIG. 2, three microphone systems 1 are arranged at equal intervals in the vertical direction of the doll 3. A sensor (not shown) can be configured to detect the height of the mouth of the person 5 and select the microphone system 1 having the optimum height. Alternatively, the microphone system 1 can be made swingable in a vertical plane with respect to the frame of the doll 3, and the axis of the sound tube 20 can be driven so as to face the mouth of the person 5. .
かかる構成により、 人間 5の口から発せられた音声は、 指向性良く 導音管 2 0に入り、 その内壁に沿って反射しながら奥の方に向って進 入し、 コンデンサマイクロフォン 1 0によって受け取られる。 人間 5 の口の方向以外からの音、 すなわち、 周囲の雑音は、 導音管 2 0に入 ることはできず、 または、 極めて、 少量しか入ることはできず、 従つ て、 S /N比が簡単な構成にもかかわらず、 極めておおきくなる効果 を有する。 With this configuration, the sound emitted from the mouth of the human 5 enters the sound guide tube 20 with good directivity, enters the back while reflecting along the inner wall, and is received by the condenser microphone 10. It is. Sound from other than the direction of the mouth of the human 5, that is, ambient noise, cannot enter the sound guide tube 20, or can enter only a very small amount, and therefore, S / N Despite the simple ratio, it has an extremely large effect.
本発明は、 表面素材に内蔵されるマイクシステムとして記載されて いるが、 もちろん、 雑音をカッ トしたり、 指向性を求められる他の 種々の用途にも適用することができ、 従って、 本発明はそれらを含む ものである。 Although the present invention is described as a microphone system built into a surface material, it is of course applicable to various other applications where noise is cut or directivity is required. Include them.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2001/000668 WO2002062100A1 (en) | 2001-01-31 | 2001-01-31 | Microphone system excellent in directivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2001/000668 WO2002062100A1 (en) | 2001-01-31 | 2001-01-31 | Microphone system excellent in directivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002062100A1 true WO2002062100A1 (en) | 2002-08-08 |
Family
ID=11736971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2001/000668 Ceased WO2002062100A1 (en) | 2001-01-31 | 2001-01-31 | Microphone system excellent in directivity |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2002062100A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101515615B1 (en) | 2013-10-10 | 2015-05-06 | 한국표준과학연구원 | microphone probe and acoustic measurement apparatus used the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52154221U (en) * | 1976-05-18 | 1977-11-22 | ||
| JPH07203574A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | Mouthpiece structure |
-
2001
- 2001-01-31 WO PCT/JP2001/000668 patent/WO2002062100A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52154221U (en) * | 1976-05-18 | 1977-11-22 | ||
| JPH07203574A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | Mouthpiece structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101515615B1 (en) | 2013-10-10 | 2015-05-06 | 한국표준과학연구원 | microphone probe and acoustic measurement apparatus used the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2554622T3 (en) | Device and method to capture and process the voice | |
| Nakajima et al. | Non-audible murmur (NAM) recognition | |
| US11507134B2 (en) | Audiovisual device with tiltable display | |
| WO2003015610A3 (en) | Determining endotracheal tube placement using acoustic reflectometry | |
| US10438609B2 (en) | System and device for audio translation to tactile response | |
| TW200808093A (en) | Electronic device | |
| EP3499911A1 (en) | In-ear headphone for improved fit and function, and related methods | |
| US6590988B2 (en) | Microphone apparatus | |
| KR101256540B1 (en) | Speaker and method of outputting acoustic sound | |
| WO2002062100A1 (en) | Microphone system excellent in directivity | |
| US5781643A (en) | Microphone plosive effects reduction techniques | |
| KR101486156B1 (en) | To focus the use's own voice can hear user voice sound collector | |
| CN103985378A (en) | Silencer | |
| Nakamura et al. | Design and collection of acoustic sound data for hands-free speech recognition and sound scene understanding | |
| US6856952B2 (en) | Detecting a characteristic of a resonating cavity responsible for speech | |
| US20050136790A1 (en) | Ultrasonic toy for animals | |
| CN110992951B (en) | Method for protecting personal privacy based on countermeasure sample | |
| JPH0441996A (en) | Ventilating fan | |
| US4142186A (en) | Means for improving the electroacoustical properties of a buzzer | |
| JP4273186B2 (en) | Microphone with speaker | |
| Chopra et al. | Voice controlled robot | |
| KR20200069154A (en) | A portable voice listening device comprisng soundproof function | |
| Nakamura et al. | Evaluation of extremely small sound source signals used in speaking-aid system with statistical voice conversion | |
| Fulop et al. | Reviews Of Acoustical Patents | |
| GB2401469A (en) | Pattern recognition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN JP KR US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| 32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 69(1)EPC, EPO FORM 1205A, DATED 26/11/03. |
|
| 122 | Ep: pct application non-entry in european phase | ||
| NENP | Non-entry into the national phase |
Ref country code: JP |