JPH03108997A - Bone conduction microphone - Google Patents
Bone conduction microphoneInfo
- Publication number
- JPH03108997A JPH03108997A JP24711589A JP24711589A JPH03108997A JP H03108997 A JPH03108997 A JP H03108997A JP 24711589 A JP24711589 A JP 24711589A JP 24711589 A JP24711589 A JP 24711589A JP H03108997 A JPH03108997 A JP H03108997A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- vibration
- bone conduction
- pickup mechanism
- bone
- 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.)
- Pending
Links
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000013016 damping Methods 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 230000001133 acceleration Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000007667 floating Methods 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 2
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 210000003128 head Anatomy 0.000 description 4
- 210000000613 ear canal Anatomy 0.000 description 3
- 210000001061 forehead Anatomy 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 210000003467 cheek Anatomy 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は骨伝導マイク、より詳細には、生体の発声に基
づく骨伝導音声信号を、額、頬、外耳道壁等からピック
アップするマイクであって、耐騒音性にすぐれ、換言す
れば、外部からの雑音の影響を受けにくい骨伝導マイク
に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a bone conduction microphone, more specifically, a microphone that picks up bone conduction audio signals based on the vocalizations of a living body from the forehead, cheeks, external auditory canal wall, etc. The present invention relates to a bone conduction microphone that has excellent noise resistance, in other words, is less susceptible to external noise.
従来より種々のタイプの骨伝導マイクが存するが、それ
らはいずれも、ピックアップ機構を内蔵したハウジング
（ケース）を直接額、外耳道壁等に当接させて骨振動を
拾うが、その場合骨振動は先ずハウジングで受け、次い
でハウジングからピックアップ機構へ伝達されてピック
アップされる。There have been various types of bone conduction microphones, but all of them pick up bone vibrations by placing a housing (case) with a built-in pickup mechanism in direct contact with the forehead, the wall of the ear canal, etc.; First, it is received by the housing, and then transmitted from the housing to the pickup mechanism and picked up.
上述したように従来の骨伝導マイクにおいては、骨振動
はハウジングを介してピックアップ機構によりピックア
ップされる。As described above, in conventional bone conduction microphones, bone vibrations are picked up by the pickup mechanism via the housing.
然るに、ハウジングには骨振動だけでなく、ケーブルを
伝わる振動（ノイズ）や外部の騒音等も伝わるため、従
来の骨伝導マイクの場合は骨振動以外の振動も音声信号
と同時にピックアップされてしまう、外部からの振動を
受けにくくするにはハウジングの重量を増すようにすれ
ばよいが、そのようにした場合は微弱な骨振動を十分に
拾えなくなってしまう。However, not only bone vibrations but also vibrations (noise) transmitted through cables and external noise are transmitted to the housing, so with conventional bone conduction microphones, vibrations other than bone vibrations are picked up at the same time as audio signals. In order to make the housing less susceptible to external vibrations, it is possible to increase the weight of the housing, but if this is done, it will not be able to sufficiently pick up weak bone vibrations.
本発明はこのような従来技術の持つ欠点を除去すること
を課題としてなされたもので、骨振動のみを効率よくピ
ックアップでき、耐騒音性にすぐれた骨伝導マイクを提
供することを目的とする。The present invention has been made to eliminate the drawbacks of the prior art, and aims to provide a bone conduction microphone that can efficiently pick up only bone vibrations and has excellent noise resistance.
本発明は、十分な質量を持ったプラスチック環装ハウジ
ング内に、制振性に優れた材料製の内ケースを配備し、
前記内ケース内にはゲル状物等の振動伝搬率の低い材料
を敷き、その上に振動ピックアップ機構を載置し、前記
振動ピックアップ機構の頭部又は一部を、前記ハウジン
グの人体との接触面に透孔を穿設する等の方法により僅
かに突出させたことを特徴とする骨伝導マイクを以て、
上記課題を解決した。The present invention provides an inner case made of a material with excellent vibration damping properties in a plastic ring housing with sufficient mass,
A material with low vibration propagation rate, such as a gel-like material, is laid inside the inner case, and a vibration pickup mechanism is placed on top of the material, and the head or part of the vibration pickup mechanism is brought into contact with the human body of the housing. With a bone conduction microphone that is characterized by being slightly protruded by a method such as drilling a through hole in the surface,
The above issues were resolved.
〔作 用〕
本発明に係る骨伝導マイクは、振動ピックアップ機構の
ハウジング外に突出する頭部が額、頬、外耳道壁等に当
たるようにして使用する。[Function] The bone conduction microphone according to the present invention is used so that the head protruding outside the housing of the vibration pickup mechanism is in contact with the forehead, cheek, wall of the external auditory canal, etc.
振動ピックアップ機構は、制振性にすぐれた内ケース内
のゲル状物上に浮いた状態に保持され、物理的にハウジ
ングと隔離されているので、ハウジングの振動は振動ピ
ックアップ機構に伝わらず、振動ピックアップ機構は直
接骨振動のみをピックアップし、音声振動以外の外音、
コード接触振動等の雑音が拾われることはない。The vibration pickup mechanism is held floating on a gel-like material inside the inner case with excellent vibration damping properties, and is physically isolated from the housing, so the vibrations of the housing are not transmitted to the vibration pickup mechanism, and the vibrations are The pickup mechanism directly picks up only bone vibrations, and removes external sounds other than audio vibrations.
Noises such as cord contact vibrations are not picked up.
本発明の好ましい実施例を図面に依拠して説明する。 Preferred embodiments of the present invention will be described with reference to the drawings.
図中１は十分な重量を持たせたプラスチック、金属、ゴ
ム環装のハウジングで、その−側面に透孔２が形成され
る。３は内ケースで、制動性（緩衝性）にすぐれた熱可
塑性樹脂系複合材等で作られる。内ケース３は、連結杆
３ａを介してハウジングｌ内に固定され、その内部に、
ゲル状シリコン等の振動伝搬率の低いゲル状物４が敷か
れ、その上に振動ピックアップ機構５が浮いた状態に載
せられる。振動ピックアップ機構５は、拾音素子５ｂと
して例えばバイモルフ等の圧電素子を内蔵した加速度ピ
ックアップ型であることが好ましい、振動ピックアップ
機構５の頭部５ａは、透孔２より僅かに突出するよう配
置される。即ち、振動ピックアップ機構５は、回りの部
材に触れることなくゲル状物４の上に浮いた状態に保持
される。このように、ハウジング１と振動ピックアップ
機構５は、制振性にすぐれた内ケース３内の振動伝搬率
の低いゲル状物４を介して隔離されるので、ハウジング
１の振動が振動ピックアップ機構５に伝わることはない
、従って、骨振動以上の振幅（加速度）の、例えば、ケ
ーブルを伝わるノイズ（振動）や外部の騒音（７０〜１
２０ ｄＢ）等の骨振動以外の振動がピックアップされ
ることはなく、微弱な骨振、動のみが確実にピックアッ
プされる。６は増幅器、７はコードである。In the figure, reference numeral 1 denotes a housing made of plastic, metal, or rubber ring with sufficient weight, and a through hole 2 is formed in the side surface of the housing. 3 is the inner case, which is made of a thermoplastic resin composite material with excellent damping properties (buffering properties). The inner case 3 is fixed within the housing l via a connecting rod 3a, and has inside thereof,
A gel-like material 4 having a low vibration propagation rate, such as gel-like silicon, is laid down, and a vibration pickup mechanism 5 is placed on it in a floating state. The vibration pickup mechanism 5 is preferably of an acceleration pickup type that incorporates a piezoelectric element such as a bimorph as the sound pickup element 5b.The head 5a of the vibration pickup mechanism 5 is arranged so as to slightly protrude from the through hole 2. Ru. That is, the vibration pickup mechanism 5 is held floating on the gel material 4 without touching surrounding members. In this way, the housing 1 and the vibration pickup mechanism 5 are isolated via the gel material 4 with a low vibration propagation rate in the inner case 3 which has excellent vibration damping properties, so that the vibration of the housing 1 is transmitted to the vibration pickup mechanism 5. Therefore, for example, noise (vibration) transmitted through cables or external noise (70 to 1
Vibrations other than bone vibrations such as 20 dB) are not picked up, and only weak bone vibrations and motions are reliably picked up. 6 is an amplifier, and 7 is a code.
本発明は上述した通りであって、本発明によれば、振動
ピックアップ機構が制振性にすぐれたゲル状物を介して
物理的にハウジングと隔離されているため、ハウジング
の振動が振動ピックアップ機構に伝達されることが抑制
され、以て骨振動のみが直接ピックアップされるので、
耐騒音性にすぐれた骨伝導マイクが得られる。The present invention is as described above, and according to the present invention, since the vibration pickup mechanism is physically isolated from the housing via the gel material with excellent vibration damping properties, the vibration of the housing is transmitted to the vibration pickup mechanism. Since only bone vibrations are directly picked up,
A bone conduction microphone with excellent noise resistance can be obtained.
第１図は本発明の実施例の正面縦断面図、第２図はその
側面縦断面図である。
符号の説明
ｌ・−・ハウジング、 ２・・・透孔３・・・内ケー
ス、 ３ａ・−・連結杆４・・・ゲル状物、 ５
・・・振動ピックアップ機構５ａ・−・頭部
５ｂ・・・袷音素子６・−増幅器 ７・・・コー
ドFIG. 1 is a front vertical sectional view of an embodiment of the present invention, and FIG. 2 is a side vertical sectional view thereof. Explanation of symbols 1...Housing, 2...Through hole 3...Inner case, 3a...Connecting rod 4...Gel-like material, 5
... Vibration pickup mechanism 5a -- Head
5b...Sound element 6--Amplifier 7...Code
Claims (2)
内に、制振性に優れた材料製の内ケースを配備し、前記
内ケース内にはゲル状物等の振動伝搬率の低い材料を敷
き、その上に振動ピックアップ機構を載置し、前記振動
ピックアップ機構の頭部又は一部を、前記ハウジングの
人体との接触面に透孔を穿設する等の方法により僅かに
突出させたことを特徴とする骨伝導マイク。(1) An inner case made of a material with excellent vibration damping properties is placed inside a housing made of plastic or the like with sufficient mass, and a material with low vibration propagation rate, such as a gel-like material, is lined inside the inner case. , a vibration pickup mechanism is placed thereon, and the head or part of the vibration pickup mechanism is made to protrude slightly by a method such as drilling a through hole in the contact surface with the human body of the housing. Features a bone conduction microphone.
度ピックアップ型であることを特徴とする請求項１記載
の骨伝導マイク。(2) The bone conduction microphone according to claim 1, wherein the vibration pickup mechanism is an acceleration pickup type using a piezoelectric element or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24711589A JPH03108997A (en) | 1989-09-22 | 1989-09-22 | Bone conduction microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24711589A JPH03108997A (en) | 1989-09-22 | 1989-09-22 | Bone conduction microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03108997A true JPH03108997A (en) | 1991-05-09 |
Family
ID=17158660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24711589A Pending JPH03108997A (en) | 1989-09-22 | 1989-09-22 | Bone conduction microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03108997A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2043518A1 (en) * | 1991-08-06 | 1993-12-16 | Consejo Superior Investigacion | Probe for measuring acoustic fields of high intensity. |
| WO1998025438A1 (en) * | 1996-12-05 | 1998-06-11 | Raychem Limited | Acoustic isolation of vibration transducer |
| WO1999013681A2 (en) * | 1997-09-05 | 1999-03-18 | 1... Ipr Limited | Aerogels, piezoelectric devices, and uses therefor |
| JP2004080198A (en) * | 2002-08-13 | 2004-03-11 | Nippon Telegr & Teleph Corp <Ntt> | Electroacoustic transducer |
| US7120477B2 (en) | 1999-11-22 | 2006-10-10 | Microsoft Corporation | Personal mobile computing device having antenna microphone and speech detection for improved speech recognition |
| US7283850B2 (en) | 2004-10-12 | 2007-10-16 | Microsoft Corporation | Method and apparatus for multi-sensory speech enhancement on a mobile device |
| US7406303B2 (en) | 2005-07-05 | 2008-07-29 | Microsoft Corporation | Multi-sensory speech enhancement using synthesized sensor signal |
| US7447630B2 (en) | 2003-11-26 | 2008-11-04 | Microsoft Corporation | Method and apparatus for multi-sensory speech enhancement |
| DE102007037561A1 (en) | 2007-08-09 | 2009-02-19 | Ceotronics Aktiengesellschaft Audio . Video . Data Communication | Sound transducer for the transmission of audio signals |
| US7499686B2 (en) | 2004-02-24 | 2009-03-03 | Microsoft Corporation | Method and apparatus for multi-sensory speech enhancement on a mobile device |
| US7680656B2 (en) | 2005-06-28 | 2010-03-16 | Microsoft Corporation | Multi-sensory speech enhancement using a speech-state model |
| US7930178B2 (en) | 2005-12-23 | 2011-04-19 | Microsoft Corporation | Speech modeling and enhancement based on magnitude-normalized spectra |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6231875A (en) * | 1985-08-03 | 1987-02-10 | Canon Inc | Elastic rotator and fixing device |
| JPS6333427U (en) * | 1986-08-20 | 1988-03-03 |
-
1989
- 1989-09-22 JP JP24711589A patent/JPH03108997A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6231875A (en) * | 1985-08-03 | 1987-02-10 | Canon Inc | Elastic rotator and fixing device |
| JPS6333427U (en) * | 1986-08-20 | 1988-03-03 |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2043518A1 (en) * | 1991-08-06 | 1993-12-16 | Consejo Superior Investigacion | Probe for measuring acoustic fields of high intensity. |
| WO1998025438A1 (en) * | 1996-12-05 | 1998-06-11 | Raychem Limited | Acoustic isolation of vibration transducer |
| WO1999013681A2 (en) * | 1997-09-05 | 1999-03-18 | 1... Ipr Limited | Aerogels, piezoelectric devices, and uses therefor |
| WO1999013681A3 (en) * | 1997-09-05 | 1999-08-05 | 1 Ipr Limited | Aerogels, piezoelectric devices, and uses therefor |
| US7120477B2 (en) | 1999-11-22 | 2006-10-10 | Microsoft Corporation | Personal mobile computing device having antenna microphone and speech detection for improved speech recognition |
| JP2004080198A (en) * | 2002-08-13 | 2004-03-11 | Nippon Telegr & Teleph Corp <Ntt> | Electroacoustic transducer |
| US7447630B2 (en) | 2003-11-26 | 2008-11-04 | Microsoft Corporation | Method and apparatus for multi-sensory speech enhancement |
| US7499686B2 (en) | 2004-02-24 | 2009-03-03 | Microsoft Corporation | Method and apparatus for multi-sensory speech enhancement on a mobile device |
| US7283850B2 (en) | 2004-10-12 | 2007-10-16 | Microsoft Corporation | Method and apparatus for multi-sensory speech enhancement on a mobile device |
| US7680656B2 (en) | 2005-06-28 | 2010-03-16 | Microsoft Corporation | Multi-sensory speech enhancement using a speech-state model |
| US7406303B2 (en) | 2005-07-05 | 2008-07-29 | Microsoft Corporation | Multi-sensory speech enhancement using synthesized sensor signal |
| US7930178B2 (en) | 2005-12-23 | 2011-04-19 | Microsoft Corporation | Speech modeling and enhancement based on magnitude-normalized spectra |
| DE102007037561A1 (en) | 2007-08-09 | 2009-02-19 | Ceotronics Aktiengesellschaft Audio . Video . Data Communication | Sound transducer for the transmission of audio signals |
| US8213643B2 (en) | 2007-08-09 | 2012-07-03 | Ceotronics Aktiengesellschaft Audio, Video, Data Communication | Sound transducer for the transmission of audio signals |
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