JP6213679B2 - デジタルスピーカ、スピーカシステム及びイヤホン - Google Patents
デジタルスピーカ、スピーカシステム及びイヤホン Download PDFInfo
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- JP6213679B2 JP6213679B2 JP2016532023A JP2016532023A JP6213679B2 JP 6213679 B2 JP6213679 B2 JP 6213679B2 JP 2016532023 A JP2016532023 A JP 2016532023A JP 2016532023 A JP2016532023 A JP 2016532023A JP 6213679 B2 JP6213679 B2 JP 6213679B2
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- 238000000034 method Methods 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 210000000613 ear canal Anatomy 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1016—Earpieces of the intra-aural type
-
- 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
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- 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
- H04R1/005—Details of transducers, loudspeakers or microphones using digitally weighted transducing elements
-
- 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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1058—Manufacture or assembly
- H04R1/1075—Mountings of transducers in earphones or headphones
-
- 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
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
-
- 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
- H04R19/02—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
- H04R2201/107—Monophonic and stereophonic headphones with microphone for two-way hands free communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
- H04R2205/022—Plurality of transducers corresponding to a plurality of sound channels in each earpiece of headphones or in a single enclosure
-
- 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
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Circuit For Audible Band Transducer (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- General Health & Medical Sciences (AREA)
- Headphones And Earphones (AREA)
Description
入力されるデジタル信号をビット単位に分割する信号分割回路と、
前記信号分割回路の出力するn個の分割後デジタル信号に基づいて、前記ビット単位で電圧を出力するn個(n≧2)のD/A変換器と、
前記D/A変換器から出力される電圧を受ける、n個の電極を離間して設けた1つの圧電素子とを備え、
前記デジタル信号の下位からiビット目(i=1,・・・,n)に係る前記分割後デジタル信号を処理する前記D/A変換器から出力される電圧をViとし、この電圧を受ける電極の面積をSiとするとき、Si・Vi=r2i−1(rは定数)を満たし、
前記圧電素子は円盤状であり、
前記圧電素子の表面に同心円状の区分を設け、前記n個の電極の各々は2以上の区分に配され、複数の区分に配された1個の電極の離間部分には、他の(n−1)個の電極が配されている。
Viが定数である。
1つの電圧源の発生する電圧が、前記n個の電極の全てに供給される。
周波数帯域によって音域を区分して2つ以上のスピーカに別々に出力させるスピーカシステムであって、最高周波数帯の音域の出力を行うスピーカが上述のデジタルスピーカである。
全てのスピーカが上述のデジタルスピーカである。
上述のスピーカシステムを備える。
11 ツイータ
12 スコーカ
13 ウーハ
2 信号分割回路
31 分割後デジタル信号
32 分割後デジタル信号
33 分割後デジタル信号
4 圧電素子
51 電極
52 電極
53 電極
6 電圧源
71 スイッチ
72 スイッチ
73 スイッチ
8 イヤホン(フレーム)
100 スピーカシステム
Claims (6)
- 入力されるデジタル信号をビット単位に分割する信号分割回路と、
前記信号分割回路の出力するn個の分割後デジタル信号に基づいて、前記ビット単位で電圧を出力するn個(n≧2)のD/A変換器と、
前記D/A変換器から出力される電圧を受ける、n個の電極を離間して設けた1つの圧電素子とを備え、
前記デジタル信号の下位からiビット目(i=1,・・・,n)に係る前記分割後デジタル信号を処理する前記D/A変換器から出力される電圧をViとし、この電圧を受ける電極の面積をSiとするとき、Si・Vi=r2i−1(rは定数)を満たし、
前記圧電素子は円盤状であり、
前記圧電素子の表面に同心円状の区分を設け、前記n個の電極の各々は2以上の区分に配され、複数の区分に配された1個の電極の離間部分には、他の(n−1)個の電極が配されている、デジタルスピーカ。 - Viが定数である、請求項1に記載のデジタルスピーカ。
- 1つの電圧源の発生する電圧が、前記n個の電極の全てに供給される、請求項2に記載のデジタルスピーカ。
- 周波数帯域によって音域を区分して2つ以上のスピーカに別々に出力させるスピーカシステムであって、最高周波数帯の音域の出力を行うスピーカが請求項1に記載のデジタルスピーカである、スピーカシステム。
- 全てのスピーカが請求項1に記載のデジタルスピーカである、請求項4に記載のスピーカシステム。
- 請求項4に記載のスピーカシステムを備えることを特徴とする、イヤホン。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015102347 | 2015-05-20 | ||
JP2015102347 | 2015-05-20 | ||
PCT/JP2016/064630 WO2016186114A1 (ja) | 2015-05-20 | 2016-05-17 | デジタルスピーカ、スピーカシステム及びイヤホン |
Publications (2)
Publication Number | Publication Date |
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JPWO2016186114A1 JPWO2016186114A1 (ja) | 2017-06-01 |
JP6213679B2 true JP6213679B2 (ja) | 2017-10-18 |
Family
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Application Number | Title | Priority Date | Filing Date |
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JP2016532023A Active JP6213679B2 (ja) | 2015-05-20 | 2016-05-17 | デジタルスピーカ、スピーカシステム及びイヤホン |
Country Status (3)
Country | Link |
---|---|
US (1) | US10021473B2 (ja) |
JP (1) | JP6213679B2 (ja) |
WO (1) | WO2016186114A1 (ja) |
Families Citing this family (1)
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JPWO2021235080A1 (ja) * | 2020-05-20 | 2021-11-25 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58104598A (ja) | 1981-11-17 | 1983-06-22 | Hitachi Ltd | 発音装置 |
JPS59128900A (ja) | 1983-01-12 | 1984-07-25 | Onkyo Corp | 圧電型電気音響変換器 |
JPH09266599A (ja) | 1996-03-27 | 1997-10-07 | Takeshi Shiraiwa | デジタルスピーカ |
JP3642460B2 (ja) | 1998-12-07 | 2005-04-27 | 松下電器産業株式会社 | デジタル式送受話器 |
US6829131B1 (en) * | 1999-09-13 | 2004-12-07 | Carnegie Mellon University | MEMS digital-to-acoustic transducer with error cancellation |
US9148712B2 (en) * | 2010-12-10 | 2015-09-29 | Infineon Technologies Ag | Micromechanical digital loudspeaker |
JP5811705B2 (ja) | 2011-09-05 | 2015-11-11 | ソニー株式会社 | イヤホン装置 |
FR2990320B1 (fr) * | 2012-05-07 | 2014-06-06 | Commissariat Energie Atomique | Haut-parleur digital a performance amelioree |
FR3010272B1 (fr) * | 2013-09-04 | 2017-01-13 | Commissariat Energie Atomique | Dispositif acoustique digital a puissance sonore augmentee |
CN103701465B (zh) * | 2013-12-02 | 2016-09-21 | 苏州上声电子有限公司 | 一种基于多比特△—σ调制的数字扬声器系统实现方法和装置 |
WO2016162829A1 (en) * | 2015-04-08 | 2016-10-13 | King Abdullah University Of Science And Technology | Piezoelectric array elements for sound reconstruction with a digital input |
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2016
- 2016-05-17 JP JP2016532023A patent/JP6213679B2/ja active Active
- 2016-05-17 US US15/575,256 patent/US10021473B2/en active Active
- 2016-05-17 WO PCT/JP2016/064630 patent/WO2016186114A1/ja active Application Filing
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Publication number | Publication date |
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US20180139527A1 (en) | 2018-05-17 |
US10021473B2 (en) | 2018-07-10 |
JPWO2016186114A1 (ja) | 2017-06-01 |
WO2016186114A1 (ja) | 2016-11-24 |
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