JPH04242638A - Silencer - Google Patents
SilencerInfo
- Publication number
- JPH04242638A JPH04242638A JP41658690A JP41658690A JPH04242638A JP H04242638 A JPH04242638 A JP H04242638A JP 41658690 A JP41658690 A JP 41658690A JP 41658690 A JP41658690 A JP 41658690A JP H04242638 A JPH04242638 A JP H04242638A
- Authority
- JP
- Japan
- Prior art keywords
- sound wave
- noise
- cutting instrument
- dental
- phase
- 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
- 230000003584 silencer Effects 0.000 title claims 2
- 230000002452 interceptive effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Abstract
Description
【産業上の利用分野】本発明は歯科用切削器具等から発
生する騒音を消音または低減させる制御装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for muffling or reducing noise generated from dental cutting instruments and the like.
【0002】0002
【従来の技術】歯科用切削器具から発生する騒音は聴覚
的に最もうるさく感じる周波数帯域と一致しており(例
えば空気で回転する空気タービンの場合、2〜7Khz
の周波数帯域にピークがある為に患者の恐怖心を煽る
原因の一つになっている。また、従来これらの消音対策
については全く方法がなく、なされていない状態である
。[Prior Art] The noise generated from dental cutting instruments corresponds to the frequency band that is perceived as the loudest (for example, in the case of an air turbine that rotates with air, the frequency range is 2 to 7 Khz).
It has a peak in the frequency band of , which is one of the causes of fear among patients. Furthermore, conventionally, there is no method at all for these noise reduction measures, and no measures have been taken.
【0003】0003
【発明が解決しようとする課題】本発明は前記従来技術
の問題点を解決するためのもので歯科治療切削器具から
発生する騒音を消音または低減させることを目的とする
ものである。SUMMARY OF THE INVENTION The present invention is intended to solve the problems of the prior art described above, and aims to muffle or reduce the noise generated from cutting instruments for dental treatment.
【0004】0004
【課題を解決するための手段および作用】切削器具から
発生する騒音を検出する為の音波検出器を患者の近傍に
一個以上設け、検出した音波の位相を解析して、逆位相
を得る増幅器によりその出力を音波として発信させる音
波発生器を患者の近傍に一個以上設けるもので、騒音を
複数の音波検出器で検出し、その信号をA/D変換後、
振幅、位相特性を自由に設定できるディジタルフィルタ
ーを通し、D/A変換してその信号をパワーアンプで増
幅し、音波発信器を通して、干渉音波を発信し、騒音を
消音または低減させるものである。[Means and effects for solving the problem] One or more sound wave detectors are provided near the patient to detect noise generated from cutting instruments, and an amplifier is used to analyze the phase of the detected sound waves and obtain the opposite phase. One or more sound wave generators that emit the output as sound waves are installed near the patient, the noise is detected by multiple sound wave detectors, and the signal is A/D converted and then
The signal is passed through a digital filter whose amplitude and phase characteristics can be freely set, subjected to D/A conversion, amplified by a power amplifier, and transmitted through a sonic wave transmitter to transmit interference sound waves to mute or reduce noise.
【0005】[0005]
【実施例】図3は音波検出器1,3と音波発信器2との
位置関係を示す模式図であり、10は切削器具、11は
切削器具用コントローラ、12は治療椅子、13は本発
明装置のコントローラーである。[Embodiment] Fig. 3 is a schematic diagram showing the positional relationship between the sound wave detectors 1, 3 and the sound wave transmitter 2, in which 10 is a cutting instrument, 11 is a controller for the cutting instrument, 12 is a treatment chair, and 13 is the invention of the present invention. It is the controller of the device.
【0006】本実施例では音波検出器1,3にマイクロ
フォンを用い、患者を中心にマイクロフォン1と3を対
称に配置した。音波発信器2にはスピーカーを用い、マ
イクロフォン1と3の中心位置に配置した。中心位置と
する一つの利点はマイクロフォン1,3とスピーカー2
の音響フィードバックを防止することにある。In this embodiment, microphones are used as the sound wave detectors 1 and 3, and the microphones 1 and 3 are arranged symmetrically with the patient at the center. A speaker was used as the sound wave transmitter 2, and it was placed at the center of the microphones 1 and 3. One advantage of central positioning is that microphones 1 and 3 and speaker 2
The purpose is to prevent acoustic feedback.
【0004】図1は本発明の一実施例を示し、ブロック
ダイヤグラムであり、1,3はマイクロフォン、2はス
ピーカー、4,5はマイクロフォンの増幅器、6は差働
増幅器である。差働増幅器6は音響フィードバック(ハ
ウリング)を防止する効果が大きい差働増幅器6の出力
はA/Dコンバーター7でディジタル化されディジタル
フィルター8により周波数解析され、振幅,位相特性を
設定して出力し、D/A変換器9により、アナログ信号
としてパワーアンプ14でパワーをアップし、スピーカ
ー2で音波を出力する。FIG. 1 shows an embodiment of the present invention, and is a block diagram in which 1 and 3 are microphones, 2 is a speaker, 4 and 5 are microphone amplifiers, and 6 is a differential amplifier. The differential amplifier 6 is highly effective in preventing acoustic feedback (howling).The output of the differential amplifier 6 is digitized by an A/D converter 7, frequency analyzed by a digital filter 8, and output after setting amplitude and phase characteristics. , the power is increased by the power amplifier 14 as an analog signal by the D/A converter 9, and the speaker 2 outputs a sound wave.
【0005】図2は騒音の位相と打ち消すための逆位相
の関係を示したものであり、マイクロフォン1,3で検
出した騒音信号P1 に対して、逆位相信号P2 を発
生させることにより、P1 +P2 =0とし、発生騒
音P1 を消去させることを示したものである。FIG. 2 shows the relationship between the phase of noise and the opposite phase for canceling it. By generating an opposite phase signal P2 for the noise signal P1 detected by the microphones 1 and 3, P1 + P2 = 0, which indicates that the generated noise P1 is eliminated.
【0006】[0006]
【発明の効果】切削器具から発生する不快な騒音を消去
または低減させることにより使用者、患者両者ともに快
適な治療が受けられるようになり、治療効率の向上が得
られる。EFFECTS OF THE INVENTION By eliminating or reducing the unpleasant noise generated from the cutting instrument, both the user and the patient can receive comfortable treatment, and treatment efficiency can be improved.
図1は本発明の一実施例を示すブロックダイヤグラム、
図2は本発明の一実施例を示す音圧dBと騒音の位相と
打消すめたの逆位相との関係図、図3は音波検出器と音
波発生器と切削器具との位置関係を示す模式図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
FIG. 2 is a diagram showing the relationship between the sound pressure dB, the phase of the noise, and the opposite phase of the canceling medium, showing an embodiment of the present invention. FIG. 3 is a schematic diagram showing the positional relationship between the sound wave detector, the sound wave generator, and the cutting tool. It is a diagram.
1,3 マイクロフォン 2 スピーカー 4,5 増幅器 6 差働増幅器 7 A/D変換器 8 ディジタルフィルター 9 D/A変換器 1, 3 Microphone 2 Speaker 4,5 Amplifier 6 Differential amplifier 7 A/D converter 8 Digital filter 9 D/A converter
Claims (2)
た診療システムにおいて、切削器具から発生する騒音を
検出する音波検出器とその検出した音波情報の位相を解
析して、逆位相に変換する制御器と、その位相信号を音
波に変換する音波発信器を備え、騒音に対して強制的な
音波干渉を行うことにより、騒音を消音または低減させ
ることを特徴とする歯科用切削器具の消音装置。Claim 1: In a medical treatment system equipped with a dental treatment unit and a patient chair, a sonic wave detector detects noise generated from a cutting instrument, and control that analyzes the phase of the detected sonic wave information and converts it into an opposite phase. 1. A sound muffling device for a dental cutting instrument, comprising a sound wave transmitter that converts a phase signal of the sound wave into a sound wave, and is characterized in that the noise is muffled or reduced by forcibly interfering with the sound wave.
消音させる構成とする請求項1記載の歯科用切削器具の
消音装置。 【0001】2. The silencer for a dental cutting instrument according to claim 1, wherein the noise frequency is selected for each frequency band and the noise is silenced. 0001
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP41658690A JPH04242638A (en) | 1990-12-28 | 1990-12-28 | Silencer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP41658690A JPH04242638A (en) | 1990-12-28 | 1990-12-28 | Silencer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04242638A true JPH04242638A (en) | 1992-08-31 |
Family
ID=18524802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP41658690A Pending JPH04242638A (en) | 1990-12-28 | 1990-12-28 | Silencer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04242638A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006325895A (en) * | 2005-05-26 | 2006-12-07 | National Institute Of Advanced Industrial & Technology | Noise reducing device |
DE102007054051A1 (en) | 2007-11-13 | 2009-05-20 | Genima Innovations Marketing Gmbh | Method for reducing anxiety and stress of patient during dental treatment, involves absorbing treatment sounds by inverse feedback over audio channel, and transferring mouth-filling image of mouth area |
WO2010026687A1 (en) * | 2008-09-03 | 2010-03-11 | Yamada Tomomi | Headrest for dental treatment chair and dental treatment chair |
KR101015318B1 (en) * | 2010-05-19 | 2011-02-15 | 서용선 | A anti-noise device for reducing the dental equipments' noise |
-
1990
- 1990-12-28 JP JP41658690A patent/JPH04242638A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006325895A (en) * | 2005-05-26 | 2006-12-07 | National Institute Of Advanced Industrial & Technology | Noise reducing device |
DE102007054051A1 (en) | 2007-11-13 | 2009-05-20 | Genima Innovations Marketing Gmbh | Method for reducing anxiety and stress of patient during dental treatment, involves absorbing treatment sounds by inverse feedback over audio channel, and transferring mouth-filling image of mouth area |
WO2010026687A1 (en) * | 2008-09-03 | 2010-03-11 | Yamada Tomomi | Headrest for dental treatment chair and dental treatment chair |
JP4718648B2 (en) * | 2008-09-03 | 2011-07-06 | 朋美 山田 | Dental treatment chair headrest and dental treatment chair |
US8480176B2 (en) | 2008-09-03 | 2013-07-09 | Tomomi Yamada | Headrest for dental treatment chair and dental treatment chair |
KR101015318B1 (en) * | 2010-05-19 | 2011-02-15 | 서용선 | A anti-noise device for reducing the dental equipments' noise |
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